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NSYSU
1.
Tsui, Po-Ting.
Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures.
Degree: Master, Electro-Optical Engineering, 2010, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0728110-114433 
► In this work, we studied the optical characteristics of the coupled double DBR structure. We use the conventional transfer matrix simulation to find the intermediate…
(more)
▼ In this work, we studied the optical characteristics of the
coupled double DBR structure. We use the conventional transfer matrix simulation to find the intermediate multilayer periods (NC), and control the position of the transmission peak and stop band. Sample is grown by solid source molecular beam epitaxy (MBE) on n+GaAs (001) substrate, and the InGaAs QDs (quantum dots) are grown in the
coupled cavity structure. The 23 periods of DBR multilayer, GaAs (91.8 nm) / AlAs (108.1 nm), obtain 99.5% reflectivity in the 1260 nm wavelength by the simulation. After the simulation from the conventional transfer matrix method, we choose NC = 13.5, the position of the transmission peak are at 1177 and 1188 nm, and optical frequency difference = 2.27 THz (Î=11 nm) in this study.From PL spectra, we observed interference between the enhanced light fields of the two
cavity modes and the agreement between measurement and simulation. This structure is potential to be a compact terahertz emission device or vertical
cavity surface emitting laser in room temperature.
Advisors/Committee Members: Tsong-Sheng Lay (committee member), Jian-Jang Huang (chair), Yi-Jen Chiu (chair), Chien-Chung Lin (chair), Chin-Ping Yu (chair).
Subjects/Keywords: coupled cavity; DBR; quantum dot
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APA (6th Edition):
Tsui, P. (2010). Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0728110-114433
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tsui, Po-Ting. “Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures.” 2010. Thesis, NSYSU. Accessed April 14, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0728110-114433.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tsui, Po-Ting. “Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures.” 2010. Web. 14 Apr 2021.
Vancouver:
Tsui P. Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures. [Internet] [Thesis]. NSYSU; 2010. [cited 2021 Apr 14].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0728110-114433.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tsui P. Study on the Optical Characteristics of Quantum Dots in Coupled Cavity Structures. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0728110-114433
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Day, C. L. Nicole.
Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
.
Degree: Physics, Engineering Physics and Astronomy, 2016, Queens University
URL: http://hdl.handle.net/1974/14526
► Light confinement and controlling an optical field has numerous applications in the field of telecommunications for optical signals processing. When the wavelength of the electromagnetic…
(more)
▼ Light confinement and controlling an optical field has numerous applications in the field of telecommunications for optical signals processing. When the wavelength of the electromagnetic field is on the order of the period of a photonic microstructure, the field undergoes reflection, refraction, and coherent scattering. This produces photonic bandgaps, forbidden frequency regions or spectral stop bands where light cannot exist. Dielectric perturbations that break the perfect periodicity of these structures produce what is analogous to an impurity state in the bandgap of a semiconductor. The defect modes that exist at discrete frequencies within the photonic bandgap are spatially localized about the cavity-defects in the photonic crystal. In this thesis the properties of two tight-binding approximations (TBAs) are investigated in one-dimensional and two-dimensional coupled-cavity photonic crystal structures
We require an efficient and simple approach that ensures the continuity of the electromagnetic field across dielectric interfaces in complex structures. In this thesis we develop {E}
– and {D}
– TBAs to calculate the modes in finite 1D and 2D two-defect coupled-cavity photonic crystal structures. In the {E}
– and {D}
– TBAs we expand the coupled-cavity \overrightarrow{E}
– modes in terms of the individual \overrightarrow{E}
– and \overrightarrow{D}
– modes, respectively. We investigate the dependence of the defect modes, their frequencies and quality factors on the relative placement of the defects in the photonic crystal structures. We then elucidate the differences between the two TBA formulations, and describe the conditions under which these formulations may be more robust when encountering a dielectric perturbation. Our 1D analysis showed that the 1D modes were sensitive to the structure geometry. The antisymmetric {D}
mode amplitudes show that the {D}
– TBA did not capture the correct (tangential \overrightarrow{E}
– field) boundary conditions. However, the {D}
– TBA did not yield significantly poorer results compared to the {E}
– TBA. Our 2D analysis reveals that the {E}
– and {D}
– TBAs produced nearly identical mode profiles for every structure. Plots of the relative difference between the {E}
and {D}
mode amplitudes show that the {D}
– TBA did capture the correct (normal \overrightarrow{E}
– field) boundary conditions. We found that the 2D TBA CC mode calculations were 125-150 times faster than an FDTD calculation for the same two-defect PCS. Notwithstanding this efficiency, the appropriateness of either TBA was found to depend on the geometry of the structure and the mode(s), i.e. whether or not the mode has a large normal or tangential component.
Subjects/Keywords: Photonic Crystals
;
Tight-Binding Approximation
;
Coupled-Cavity
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APA (6th Edition):
Day, C. L. N. (2016). Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/14526
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Day, C L Nicole. “Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
.” 2016. Thesis, Queens University. Accessed April 14, 2021.
http://hdl.handle.net/1974/14526.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Day, C L Nicole. “Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
.” 2016. Web. 14 Apr 2021.
Vancouver:
Day CLN. Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
. [Internet] [Thesis]. Queens University; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1974/14526.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Day CLN. Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures
. [Thesis]. Queens University; 2016. Available from: http://hdl.handle.net/1974/14526
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
3.
Liu, Peter Qiang.
MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
.
Degree: PhD, 2012, Princeton University
URL: http://arks.princeton.edu/ark:/88435/dsp01fj236213g
► Understanding and harnessing interactions between light and matter have been an enduring endeavor in human history and a centerpiece of modern science and technology developments,…
(more)
▼ Understanding and harnessing interactions between light and matter have been an enduring endeavor in human history and a centerpiece of modern science and technology developments, and given birth to numerous brilliant inventions such as light emitting diodes and lasers that completely changed the world. Quantum Cascade (QC) lasers as one of the newest achievements in this rank have motivated a broad range of exciting potential applications such as high-sensitivity trace gas sensing, non-invasive glucose monitoring, free-space optical communication, etc. Although the QC laser technology has been undergoing a rapid and steady development phase ever since its invention in 1994, further improvements in aspects such as output power, efficiency, spectral purity and cost-effectiveness are indispensable for large-scale implementations of QC laser based application systems. To meet such ends, we explore in this thesis novel approaches from the device structural design perspective to further improve the overall performance of QC lasers and lower their fabrication cost, while at the same time assess new application possibilities.
Exploiting the extraordinary design flexibility of the QC laser band-structure, we demonstrate a major step forward in the power performance of QC lasers by employing a novel ultra-strong coupling design strategy. A record QC laser wall-plug efficiency of ~50% is achieved. Such high-performance QC lasers enable our proof-of-concept implementation of a mid-IR backscattering light detection and ranging (LIDAR) system. Moreover, the ultra-strong coupling design strategy is also applied to realizing QC lasers with broad-band optical gain. QC lasers with optical gain spectrum width corresponding to ~40% of the radiative transition energy are demonstrated.
As single-mode operation of QC lasers is indispensable for most sensing applications, we further explore unconventional laser
cavity designs to achieve single-mode QC lasers more cost-effectively. Two fundamentally different approaches, i.e., the
monolithic coupled-cavities and the asymmetric Mach-Zehnder interferometer type cavities, are proposed and experimentally verified. Both types of cavities are capable of establishing strong wavelength selectivity and facilitating single-mode operation of QC lasers without the need of sub-wavelength periodic feedback structures, and therefore are much more cost-effective than conventional single-mode QC laser technologies.
Our explorations presented in this thesis widen the territory for the QC laser research field and shed light on new directions for future explorations.
Advisors/Committee Members: Gmachl, Claire F (advisor).
Subjects/Keywords: Asymmetric Mach-Zehnder interferometer;
Mid-infrared LIDAR;
Monolithic coupled-cavity;
Quantum Cascade laser;
Single-mode;
Ultra-strong coupling
…4.6
130
Schematic of a monolithic coupled-cavity building block exploiting the mode… …packaging processes for the hair-pin shaped
monolithic coupled-cavity QC lasers… …hair-pin
shaped monolithic coupled-cavity designs. (b) SEM image of a fabricated… …hair-pin
shaped monolithic coupled-cavity QC laser
xviii
135
4.10
(… …shaped monolithic coupled-cavity QC lasers
with the same half-ring diameter (50 µm)…
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APA ·
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APA (6th Edition):
Liu, P. Q. (2012). MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
. (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01fj236213g
Chicago Manual of Style (16th Edition):
Liu, Peter Qiang. “MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
.” 2012. Doctoral Dissertation, Princeton University. Accessed April 14, 2021.
http://arks.princeton.edu/ark:/88435/dsp01fj236213g.
MLA Handbook (7th Edition):
Liu, Peter Qiang. “MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
.” 2012. Web. 14 Apr 2021.
Vancouver:
Liu PQ. MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
. [Internet] [Doctoral dissertation]. Princeton University; 2012. [cited 2021 Apr 14].
Available from: http://arks.princeton.edu/ark:/88435/dsp01fj236213g.
Council of Science Editors:
Liu PQ. MID-INFRARED QUANTUM CASCADE LASERS WITH NOVEL ACTIVE CORE AND LASER CAVITY DESIGNS
. [Doctoral Dissertation]. Princeton University; 2012. Available from: http://arks.princeton.edu/ark:/88435/dsp01fj236213g
University of Colorado
4.
Kindel, William F.
Generation and Efficient Measurement of Single Photons Using Superconducting Circuits.
Degree: PhD, Physics, 2015, University of Colorado
URL: https://scholar.colorado.edu/phys_gradetds/153
► In this thesis, I demonstrate and evaluate an on-demand source of single propagating microwaves photons. Working in the context of a quantum network, nodes…
(more)
▼ In this thesis, I demonstrate and evaluate an on-demand source of single propagating microwaves photons. Working in the context of a quantum network, nodes are connected via propagating, nonclassical states of the electromagnetic field. As such, preparing and detecting propagating quantum states is an essential task. I work with one particular node consisting of a microfabricated, effective two level system
coupled to a microwave resonator and study its ability to produce propagating nonclassical states, such as single photon states. In principle, states generated by this node could be sent to other such nodes. However, I send them into a Josephson parametric amplifier (JPA) to characterize the source.
In particular, I discuss how to design and couple the two components that form my source: a fixed frequency transmon qubit and a 3D superconducting waveguide
cavity. I demonstrate the ability to control of the dynamics of this combined system and implement a single photon generation protocol, which utilizes a single microwave control field that is far detuned from the photon emission frequency. To characterize the generation, I perform tomography on the propagating photon state to determine its density matrix
ρ. I perform repeated JPA-backed, linear measurements of the propagating state. Based on the histograms of my measurements, I infer a maximum single photon component
ρ11 = 0:36 ± 0:01. I characterize the imperfections of the photon generation and detection, including detection inefficiency and measurement backaction. I find that within uncertainty my measurements match my expectation.
Advisors/Committee Members: Konrad W. Lehnert, Murray Holland, Charles Rogers, James Thompson, Mathias Weber.
Subjects/Keywords: circuit; microwave; photon; qubit; cavity design; coupled system; Quantum Physics
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APA (6th Edition):
Kindel, W. F. (2015). Generation and Efficient Measurement of Single Photons Using Superconducting Circuits. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/phys_gradetds/153
Chicago Manual of Style (16th Edition):
Kindel, William F. “Generation and Efficient Measurement of Single Photons Using Superconducting Circuits.” 2015. Doctoral Dissertation, University of Colorado. Accessed April 14, 2021.
https://scholar.colorado.edu/phys_gradetds/153.
MLA Handbook (7th Edition):
Kindel, William F. “Generation and Efficient Measurement of Single Photons Using Superconducting Circuits.” 2015. Web. 14 Apr 2021.
Vancouver:
Kindel WF. Generation and Efficient Measurement of Single Photons Using Superconducting Circuits. [Internet] [Doctoral dissertation]. University of Colorado; 2015. [cited 2021 Apr 14].
Available from: https://scholar.colorado.edu/phys_gradetds/153.
Council of Science Editors:
Kindel WF. Generation and Efficient Measurement of Single Photons Using Superconducting Circuits. [Doctoral Dissertation]. University of Colorado; 2015. Available from: https://scholar.colorado.edu/phys_gradetds/153
University of Ontario Institute of Technology
5.
Sun, Yuan.
Compact microwave filter designs based on cavity resonators.
Degree: 2016, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/648
► Cavity resonators are widely used in microwave filters and multiplexers due to their high quality factor and high power handling capability. Compact designs of these…
(more)
▼ Cavity resonators are widely used in microwave filters and multiplexers due to their high quality factor and high power handling capability. Compact designs of these filters are important for practical applications, as they are generally bulky. In this thesis, two types of compact microwave filter designs based on
cavity resonators are developed.
Firstly, through the use of additional posts in irises of a dielectric resonator filter (DRF), a dual-band filter can be achieved. Metal posts, which can be realized using screws, are applied in the irises of dielectric resonator filters working as capacitive obstacles. These posts along with the irises and dielectric resonator enclosure, which work below cut-off, can form the resonators to function as an evanescent mode filter. With the existing dielectric resonator filter, a dual-band filter design can be achieved. Using a properly designed coaxial input/output structure, the two passbands can be tuned individually and then combined together. An example of the dual-band filter is designed and simulated to verify the design concept.
A new compact design of a hybrid-
coupled filter module (HCFM) is also introduced in this thesis, for applications in communication satellites as a combiner. A conventional HCFM consists of two complete 3dB hybrid couplers and two identical passband filters in the middle. In this work, we use the inter-resonator couplings between two filters to replace one of the branches in a 3dB hybrid coupler used in HCFM to make the design more compact. Implementation of the new design is realized using waveguide filters, dielectric resonator filters and coaxial
cavity filters. In all cases, the new structure preserves the responses of a conventional design. The circuit model in ADS and the 3D structure in electromagnetic (EM) simulator HFSS are built to verify the concept. Moreover, by using tuning screws in both
cavity resonators and waveguide T-junctions, we achieve the tunability of the HCFM.
Advisors/Committee Members: Wang, Ying.
Subjects/Keywords: Cavity resonators; Dual-band filter; Hybrid-coupled filter module
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APA ·
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Manager
APA (6th Edition):
Sun, Y. (2016). Compact microwave filter designs based on cavity resonators. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/648
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sun, Yuan. “Compact microwave filter designs based on cavity resonators.” 2016. Thesis, University of Ontario Institute of Technology. Accessed April 14, 2021.
http://hdl.handle.net/10155/648.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sun, Yuan. “Compact microwave filter designs based on cavity resonators.” 2016. Web. 14 Apr 2021.
Vancouver:
Sun Y. Compact microwave filter designs based on cavity resonators. [Internet] [Thesis]. University of Ontario Institute of Technology; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10155/648.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sun Y. Compact microwave filter designs based on cavity resonators. [Thesis]. University of Ontario Institute of Technology; 2016. Available from: http://hdl.handle.net/10155/648
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Kalinauskaite, Eimante.
Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.
Degree: 2018, RIAN
URL: http://eprints.maynoothuniversity.ie/10049/
► The primary concern of this thesis is the development of theoretical and computational techniques for the modelling of cavity coupled bolometric detectors for future millimetre…
(more)
▼ The primary concern of this thesis is the development of theoretical and computational techniques for the modelling of cavity coupled bolometric detectors for future millimetre wave and terahertz astronomical receivers. Hypersensitive bolometer based receivers will be required to answer current open questions in astronomy concerning star and planetary formation, solar system physics as well as galaxy evolution and interaction. As part of the work for this thesis, fast and efficient Python code, GAMMA (Generalised Absorber Mode Matching Analysis), was developed and applied to existing and proposed future systems.
One of the main goals of GAMMA was to analyse the performance of the proposed multimode pixel for the SAFARI instrument on the next generation SPICA terahertz space telescope. The pixels contain a free space gap between the horn and the cavity. The array of detectors will lie on a chip with an array of horns feeding them from the frontside and an array of backshort cavities behind them. The beam patterns for a SAFARI-like pixel were computed, using a direct calculation of the power absorbed by the bolometer in free space. This shows how the formalism can be used to directly calculate the power absorbed by a detector in a realistic terahertz receiver system.
The impact of the various potential manufacturing tolerance levels for the feed horn on the predictions of the beam on the sky were also analysed for a millimetre-wave system. The specific example considered was the new 4 mm receiver on the Onsala Space Observatory 20 m millimetre-wave telescope. Mode matching, Gaussian Beam Mode Analysis and Physical Optics were used to determine the behaviour of the optical relay system.
GAMMA was also applied to the multimode 857 and 545 GHz ESA Planck HFI channels. Agreement between previous predictions and both laboratory and in-flight measurements reported in literature was improved on.
Subjects/Keywords: Electromagnetic; Quasi-Optical Analysis; Cavity Coupled Bolometers; Far-Infrared and Terahertz Receivers
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kalinauskaite, E. (2018). Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. (Thesis). RIAN. Retrieved from http://eprints.maynoothuniversity.ie/10049/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kalinauskaite, Eimante. “Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.” 2018. Thesis, RIAN. Accessed April 14, 2021.
http://eprints.maynoothuniversity.ie/10049/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalinauskaite, Eimante. “Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.” 2018. Web. 14 Apr 2021.
Vancouver:
Kalinauskaite E. Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. [Internet] [Thesis]. RIAN; 2018. [cited 2021 Apr 14].
Available from: http://eprints.maynoothuniversity.ie/10049/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalinauskaite E. Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. [Thesis]. RIAN; 2018. Available from: http://eprints.maynoothuniversity.ie/10049/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
7.
Kalinauskaite, Eimante.
Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.
Degree: 2018, RIAN
URL: http://mural.maynoothuniversity.ie/10049/
► The primary concern of this thesis is the development of theoretical and computational techniques for the modelling of cavity coupled bolometric detectors for future millimetre…
(more)
▼ The primary concern of this thesis is the development of theoretical and computational techniques for the modelling of cavity coupled bolometric detectors for future millimetre wave and terahertz astronomical receivers. Hypersensitive bolometer based receivers will be required to answer current open questions in astronomy concerning star and planetary formation, solar system physics as well as galaxy evolution and interaction. As part of the work for this thesis, fast and efficient Python code, GAMMA (Generalised Absorber Mode Matching Analysis), was developed and applied to existing and proposed future systems.
One of the main goals of GAMMA was to analyse the performance of the proposed multimode pixel for the SAFARI instrument on the next generation SPICA terahertz space telescope. The pixels contain a free space gap between the horn and the cavity. The array of detectors will lie on a chip with an array of horns feeding them from the frontside and an array of backshort cavities behind them. The beam patterns for a SAFARI-like pixel were computed, using a direct calculation of the power absorbed by the bolometer in free space. This shows how the formalism can be used to directly calculate the power absorbed by a detector in a realistic terahertz receiver system.
The impact of the various potential manufacturing tolerance levels for the feed horn on the predictions of the beam on the sky were also analysed for a millimetre-wave system. The specific example considered was the new 4 mm receiver on the Onsala Space Observatory 20 m millimetre-wave telescope. Mode matching, Gaussian Beam Mode Analysis and Physical Optics were used to determine the behaviour of the optical relay system.
GAMMA was also applied to the multimode 857 and 545 GHz ESA Planck HFI channels. Agreement between previous predictions and both laboratory and in-flight measurements reported in literature was improved on.
Subjects/Keywords: Electromagnetic; Quasi-Optical Analysis; Cavity Coupled Bolometers; Far-Infrared and Terahertz Receivers
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kalinauskaite, E. (2018). Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. (Thesis). RIAN. Retrieved from http://mural.maynoothuniversity.ie/10049/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kalinauskaite, Eimante. “Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.” 2018. Thesis, RIAN. Accessed April 14, 2021.
http://mural.maynoothuniversity.ie/10049/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalinauskaite, Eimante. “Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers.” 2018. Web. 14 Apr 2021.
Vancouver:
Kalinauskaite E. Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. [Internet] [Thesis]. RIAN; 2018. [cited 2021 Apr 14].
Available from: http://mural.maynoothuniversity.ie/10049/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalinauskaite E. Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers. [Thesis]. RIAN; 2018. Available from: http://mural.maynoothuniversity.ie/10049/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Maryland
8.
Larsen, Paul Benjamin.
Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier.
Degree: Electrical Engineering, 2011, University of Maryland
URL: http://hdl.handle.net/1903/11972
► This thesis develops a qualified design for a sheet-beam coupled-cavity slow-wave structure for use in a high-power millimeter wave traveling wave tube amplifier. The main…
(more)
▼ This thesis develops a qualified design for a sheet-beam
coupled-
cavity slow-wave structure for use in a high-power millimeter wave traveling wave tube amplifier. The main advance realized in the design is the roughly ten-fold increase in power gained by utilizing a sheet, rather than cylindrical, beam while at the same time employing mode-suppression techniques to suppress competing modes that are introduced by the sheet geometry. This design addresses considerations relevant to high-power tubes in general, as well as points specific to the design of a sheet-beam structure.
The
coupled-
cavity structure is designed with the following general characteristics: center frequency of 35 GHz with greater than a 10% bandwidth, and capabilities of 5 kW pulsed output power. The device operating parameters are as follows: a moderate gain of 18 dB, and an experimentally demonstrated sheet electron beam with 3.5 A, 19.5 kV, and 0.3 mm x 4.0 mm beam cross-section. The final design goal has been to limit the interaction length as much as possible to reduce magnet weight and complications.
A final design structure is proposed, which produces in excess of 5 kW peak power in simulation with safeguards from instabilities. The structure geometry is based on a novel design for a sheet-beam
coupled-
cavity slow-wave structure that has been characterized through various analyses, simulations, and experiments. This thesis outlines and details the various techniques used to probe the structure and thus form a full characterization of the structure and proposed amplifier device.
The concept espoused by much of this work is to adapt the analyses from cylindrical beam devices for the sheet-beam geometry. Then we make comparisons between the new sheet-beam structure and conventional devices. From these comparisons we draw conclusions on the operation of sheet-beam amplifiers and make design choices accordingly. The final design is validated with fully three-dimensional particle simulations and predicts stable amplification across the range of operation.
Advisors/Committee Members: Antonsen, Thomas M (advisor).
Subjects/Keywords: Electrical engineering; coupled-cavity; high-power; instabilities; microwave amplifier; sheet-beam; traveling-wave tube
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APA (6th Edition):
Larsen, P. B. (2011). Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/11972
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Larsen, Paul Benjamin. “Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier.” 2011. Thesis, University of Maryland. Accessed April 14, 2021.
http://hdl.handle.net/1903/11972.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Larsen, Paul Benjamin. “Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier.” 2011. Web. 14 Apr 2021.
Vancouver:
Larsen PB. Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier. [Internet] [Thesis]. University of Maryland; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1903/11972.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Larsen PB. Design of an Overmoded Ka-Band Sheet-Beam Coupled-Cavity Traveling-Wave Tube Amplifier. [Thesis]. University of Maryland; 2011. Available from: http://hdl.handle.net/1903/11972
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Oklahoma
9.
Rassel, SM Shazzad.
CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES.
Degree: PhD, 2018, University of Oklahoma
URL: http://hdl.handle.net/11244/299799
► Interband cascade lasers (ICLs) are efficient source of mid-infrared light for many applications that require low power consumption and continuous wave (cw) operation at room…
(more)
▼ Interband cascade lasers (ICLs) are efficient source of mid-infrared light for many applications that require low power consumption and continuous wave (cw) operation at room temperature. In the last decade, remarkable progress has been made in developing ICLs on GaSb substrates, mainly in the 3 to 4μm wavelength region, but room temperature (RT) cw operation at the longer wavelength region beyond 6μm has not been achieved. Based on the characterization of earlier grown ICLs, InAs-based plasmon-waveguide ICLs were designed and fabricated to achieve improved performance near or beyond 6μm. These lasers were extensively characterized, investigated and analyzed in terms of various performance features and compared to other state-of-the-art lasers. One laser demonstrated a threshold current density (Jth) as low as 333A/cm2 at 300K for emission at 6003nm. This Jth is the lowest ever reported for a mid-infrared semiconductor laser in this wavelength range. These ICLs lased at temperatures up to 293K in cw mode and up to 357K in pulsed mode. A narrow-ridge laser operated in cw at 293K with a threshold input power as low as 0.66W, and was able to generate 3mW/facet output power at 280K, without accounting for beam divergence loss. These results are very encouraging examples of efficient ICLs at long wavelengths with low power consumption.
To investigate the quality of the laser beam of these InAs-based ICLs, the far-field patterns were studied and analyzed for both broad-area and narrow-ridge geometries. In the growth direction, near diffraction-limited single-mode beams were obtained. As expected, multi-mode lasing was observed in the lateral direction because the stripe widths were much longer than the lasing wavelength. Also, as expected, these multi-modes were found to be dependent on applied bias current. These far-field profiles were compared to simulations and reasonable agreement was obtained. Beam propagation factors were plotted against the laser stripe sizes and the values were found close to unity along the growth direction -indicating better beam quality, and below 18 along lateral direction -indicating room for improvement. This methodology can be applied to previously fabricated ICLs to better understand their beam optics.
In a related research project, single mode operation of ICLs was obtained by designing and fabricating a cleaved-
coupled-
cavity (CCC) laser. In our case, rather than cleaving to fabricate two cavities, we successfully demonstrated two ion-milling recipes, using a focused ion beam (FIB) to fabricate our CCC lasers. One recipe separated the two sections of CCC lasers electrically and the other recipe milled a narrow slot (air-gap) into the mesa. Based on the optical power from the fabricated cavities, the quality of the milled facet was found to be comparable to that of an as-cleaved facet. This CCC laser demonstrated a single mode operation at ~3109nm at room temperature with a reasonable side-mode-suppression-ratio (SMSR) of 24dB. A continuous tuning range of ~1.1nm and…
Advisors/Committee Members: Yang, Rui (advisor), Johnson, Matthew (committee member), Santos, Michael (committee member), Sigmarsson, Hjalti (committee member), Fulton, Caleb (committee member).
Subjects/Keywords: interband cascade laser; high-frequency; coupled cavity laser; far field beam; carrier transport
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APA (6th Edition):
Rassel, S. S. (2018). CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/299799
Chicago Manual of Style (16th Edition):
Rassel, SM Shazzad. “CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES.” 2018. Doctoral Dissertation, University of Oklahoma. Accessed April 14, 2021.
http://hdl.handle.net/11244/299799.
MLA Handbook (7th Edition):
Rassel, SM Shazzad. “CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES.” 2018. Web. 14 Apr 2021.
Vancouver:
Rassel SS. CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES. [Internet] [Doctoral dissertation]. University of Oklahoma; 2018. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/11244/299799.
Council of Science Editors:
Rassel SS. CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES. [Doctoral Dissertation]. University of Oklahoma; 2018. Available from: http://hdl.handle.net/11244/299799
University of Colorado
10.
Kim, Jaehong.
Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils.
Degree: PhD, 2010, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/29
► The objective of the research is to compare various features of partially-saturated soil models within a coupled small strain triphasic mixture finite element implementation…
(more)
▼ The objective of the research is to compare various features of partially-saturated soil models within a
coupled small strain triphasic mixture finite element implementation to determine an appropriate constitutive modeling framework for partially-saturated soils. To achieve the objective, specific research tasks include: (1) formulating and implementing a small strain nonlinear triphasic mixture finite element in a Matlab code; (2) verifying the triphasic mixture element in Matlab code to partially-saturated water flow simulated by commercial codes and a closed-form solution; (3) formulating and implementing a small strain partially-saturated soil hyperelasto-plasticity model in the Matlab code; (4) using constitutive parameters from experimental data available in the literature; and (5) conducting plane strain finite element analysis of rainfall infiltration into slope surfaces with gravity loading.
Advisors/Committee Members: Richard A. Regueiro, Seung-Rae Lee, Ning Lu, Ronald Y. S. Pak, Stein Sture.
Subjects/Keywords: Cam-clay model; finite element analysis; monolithic coupled analysis; partially saturated soil; slope stability; triphasic mixture analysis; Civil Engineering; Geotechnical Engineering
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APA (6th Edition):
Kim, J. (2010). Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/29
Chicago Manual of Style (16th Edition):
Kim, Jaehong. “Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils.” 2010. Doctoral Dissertation, University of Colorado. Accessed April 14, 2021.
https://scholar.colorado.edu/cven_gradetds/29.
MLA Handbook (7th Edition):
Kim, Jaehong. “Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils.” 2010. Web. 14 Apr 2021.
Vancouver:
Kim J. Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils. [Internet] [Doctoral dissertation]. University of Colorado; 2010. [cited 2021 Apr 14].
Available from: https://scholar.colorado.edu/cven_gradetds/29.
Council of Science Editors:
Kim J. Plasticity Modeling and Coupled Finite Element Analysis for Partially-Saturated Soils. [Doctoral Dissertation]. University of Colorado; 2010. Available from: https://scholar.colorado.edu/cven_gradetds/29
University of Toronto
11.
Zhang, Jenmy Zimi.
Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method.
Degree: PhD, 2017, University of Toronto
URL: http://hdl.handle.net/1807/79548
► This thesis is motivated by the desire to discover fuel efficient aircraft concepts through exploratory design. An optimization methodology based on tightly integrated high-fidelity aerostructural…
(more)
▼ This thesis is motivated by the desire to discover fuel efficient aircraft concepts through exploratory design. An optimization methodology based on tightly integrated high-fidelity aerostructural analysis is proposed, which has the flexibility, robustness, and efficiency to contribute to this goal.
The present aerostructural optimization methodology uses an integrated geometry parameterization and mesh movement strategy, which was initially proposed for aerodynamic shape optimization. This integrated approach provides the optimizer with a large amount of geometric freedom for conducting exploratory design, while allowing for efficient and robust mesh movement in the presence of substantial shape changes. In extending this approach to aerostructural optimization, this thesis has addressed a number of important challenges. A structural mesh deformation strategy has been introduced to translate consistently the shape changes described by the geometry parameterization to the structural model. A three-field formulation of the discrete steady aerostructural residual couples the mesh movement equations with the three-dimensional Euler equations and a linear structural analysis. Gradients needed for optimization are computed with a three-field
coupled adjoint approach. A number of investigations have been conducted to demonstrate the suitability and accuracy of the present methodology for use in aerostructural optimization involving substantial shape changes.
Robustness and efficiency in the
coupled solution algorithms is crucial to the success of an exploratory optimization. This thesis therefore also focuses on the design of an effective
monolithic solution algorithm for the proposed methodology. This involves using a Newton-Krylov method for the aerostructural analysis and a preconditioned Krylov subspace method for the
coupled adjoint solution. Several aspects of the
monolithic solution method have been investigated. These include appropriate strategies for scaling and matrix-vector product evaluation, as well as block preconditioning techniques that preserve the modularity between subproblems. The
monolithic solution method is applied to problems with varying degrees of fluid-structural coupling, as well as a wing span optimization study. The
monolithic solution algorithm typically requires 20%-70% less computing time than its partitioned counterpart. This advantage increases with increasing wing flexibility. The performance of the
monolithic solution method is also much less sensitive to the choice of the solution parameter.
Advisors/Committee Members: Zingg, David W, Aerospace Science and Engineering.
Subjects/Keywords: Aerostructural Optimization; Aircraft Design; Computational Fluid Dynamics; Coupled adjoint; Geometry Parameterization and Mesh Movement; Monolithic Solution Algorithm; 0538
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APA ·
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CSE |
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APA (6th Edition):
Zhang, J. Z. (2017). Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/79548
Chicago Manual of Style (16th Edition):
Zhang, Jenmy Zimi. “Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method.” 2017. Doctoral Dissertation, University of Toronto. Accessed April 14, 2021.
http://hdl.handle.net/1807/79548.
MLA Handbook (7th Edition):
Zhang, Jenmy Zimi. “Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method.” 2017. Web. 14 Apr 2021.
Vancouver:
Zhang JZ. Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method. [Internet] [Doctoral dissertation]. University of Toronto; 2017. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1807/79548.
Council of Science Editors:
Zhang JZ. Exploratory High-Fidelity Aerostructural Optimization using an Efficient Monolithic Solution Method. [Doctoral Dissertation]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/79548
12.
Heine, Robert Gerd.
Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta.
Degree: 2006, Technische Universität Dortmund
URL: http://hdl.handle.net/2003/22989
► In einem Elektronenbeschleuniger werden Hochfrequenz-Hohlraumresonatoren zur Beschleunigung der Elektronen und zum Ausgleich des Energieverlustes der Elektronen durch Abstrahlung von Synchrotronstrahlung verwendet. Die höheren Moden dieser…
(more)
▼ In einem
Elektronenbeschleuniger werden Hochfrequenz-Hohlraumresonatoren zur
Beschleunigung der Elektronen und zum Ausgleich des
Energieverlustes der Elektronen durch Abstrahlung von
Synchrotronstrahlung verwendet. Die höheren Moden dieser
Resonatoren können den Elektronenstrahl zu unerwünschten
kollektiven Oszillationen (
Coupled-Bunch Moden) anregen und ihn so
in eine Instabilität treiben. In dieser Arbeit wird der Einfluss
verschiedener zur Beschleunigung von Elektronen verwendeter
Hohlraumresonatoren auf das Stabilitätsverhalten des Teilchenstrahl
im Speicherring Delta untersucht. Die Experimente fanden bei
verschiedenen Teilchenenergien und Strahlströmen des Beschleunigers
mit zwei unterschiedlichen in den Beschleuniger eingebauten
Resonatoren statt, wobei der Teilchenstrahl auf durch höhere
Resonatormoden induzierte Strahloszillation vermessen wurde.
Weiterhin wurde der Einfluss der Füllstruktur des Strahls auf das
Anregungsspektrum der
Coupled-Bunch Moden untersucht. Zusammenhänge
der gemessenen Spektren sowohl mit Resonatormoden, als auch mit der
Füllstruktur konnten nachgewiesen werden.
Advisors/Committee Members: Dietrich, J., Weis,
T..
Subjects/Keywords: Beam instability; Beschleuniger;
Cavity resonator; Collective oscillation; Coupled-Bunch Moden;
Hohlraumresonatoren; Kollektive Schwingungen; Mode damping;
Modendämpfung; Particle accelerator; Strahlinstabilitäten;
530
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APA ·
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Export
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APA (6th Edition):
Heine, R. G. (2006). Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta. (Thesis). Technische Universität Dortmund. Retrieved from http://hdl.handle.net/2003/22989
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Heine, Robert Gerd. “Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta.” 2006. Thesis, Technische Universität Dortmund. Accessed April 14, 2021.
http://hdl.handle.net/2003/22989.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Heine, Robert Gerd. “Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta.” 2006. Web. 14 Apr 2021.
Vancouver:
Heine RG. Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta. [Internet] [Thesis]. Technische Universität Dortmund; 2006. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/2003/22989.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Heine RG. Untersuchung der Wechselwirkung
intensiver Elektronenstrahlen mit höheren Resonatormoden an
Delta. [Thesis]. Technische Universität Dortmund; 2006. Available from: http://hdl.handle.net/2003/22989
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Dhindsa, Navneet.
Vertical Semiconductor Nanowires: Engineering Light at Nanoscale.
Degree: 2016, University of Waterloo
URL: http://hdl.handle.net/10012/11090
► Vertical semiconductor nanowires have gained considerable attention in the last decade for their attractive optical and electronic properties. Their high surface to volume ratio and…
(more)
▼ Vertical semiconductor nanowires have gained considerable attention in the last decade for their attractive optical and electronic properties. Their high surface to volume ratio and their ability to confine charge carriers and photons in one dimension has enabled them to be a promising candidate for improved as well as novel devices in nanophotonics and optoelectronics. However, it is necessary to achieve high quality nanowires with controllable features to fully understand and fine-tune the optical properties of the nanowires to achieve desired applications.
In this study, various semiconductor materials like Gallium Arsenide (GaAs), Silicon and Amorphous Silicon (a-Si) were chosen to analyze and compare their optical properties using reflection measurements and finite difference time domain (FDTD) simulations. The nature of modal excitations in nanowires with the change in their diameter, pitch, shape and length are understood through simulation studies and verified using the measure- ments. Optical waveguiding, near field coupling, Fabry-Perot modes are comprehensively understood for the first time in the nanowire arrays.
The ordered nanowires arrays are fabricated using Inductively Coupled Plasma Reactive Ion Etching (ICP-RIE) and a good understanding of the etching chemistries of chosen materials is achieved to fabricate high aspect ratio (length to diameter ratio) nanowire arrays. For GaAs nanowires, the aspect ratio of up to 73 is achieved with the controlled diameters for the very first time. For a variety of hard masks, etching parameters have been developed to get a good control over the sidewalls, diameters, and shapes of the nanowires. The silicon nanowires etching parameters are modified to achieve different shapes in lateral and longitudinal directions. Lastly, Gallium Nitride (GaN) nanowires are fabricated using chlorine chemistry with nitrogen as a clean passivation gas and wide varieties of masks and their combinations have been tested to achieve vertical morphology.
iii
Based on the understandings we achieved for the nanowires, a new platform is introduced for a-Si nanowires by etching them on a glass substrate and by integrating thin film with them to achieve the solar weighed absorptance 200-250 % higher than the thin film of the same thickness. Designs for broadband absorption in Gallium Arsenide nanowires are also considered and highest absorption achieved in those nanowires giving solar weighed absorption efficiency as high as 94%.
This thesis spans both design of nanowire arrays for various applications, and fabrication and experimental verifications of them. As the comprehensive studies were done on the optical properties of the nanowire, the thesis presents a complete picture of various optical modes and phenomena, which emanate in them due to their interaction with light. It will provide optoelectronics engineers design directions as nanowire devices are considered in the future of commercial applications.
Subjects/Keywords: Top-Down Fabrication; Gallium Arsenide; Amorphous SIlicon; Silicon; Nanowires; Optical Modelling; Optical Characterization; Waveguiding; Near Field Coupling; Coupled Cavity Modes
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APA (6th Edition):
Dhindsa, N. (2016). Vertical Semiconductor Nanowires: Engineering Light at Nanoscale. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11090
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dhindsa, Navneet. “Vertical Semiconductor Nanowires: Engineering Light at Nanoscale.” 2016. Thesis, University of Waterloo. Accessed April 14, 2021.
http://hdl.handle.net/10012/11090.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dhindsa, Navneet. “Vertical Semiconductor Nanowires: Engineering Light at Nanoscale.” 2016. Web. 14 Apr 2021.
Vancouver:
Dhindsa N. Vertical Semiconductor Nanowires: Engineering Light at Nanoscale. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10012/11090.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dhindsa N. Vertical Semiconductor Nanowires: Engineering Light at Nanoscale. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/11090
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manchester
14.
Shi, Liangliang.
Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL.
Degree: 2017, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:309913
► Instrumentation of higher order modes (HOMs) excited in accelerating cavities for beam phase and position inference provides a noninvasive and economical beam diagnostic. The principles…
(more)
▼ Instrumentation of higher order modes (HOMs)
excited in accelerating cavities for beam phase and position
inference provides a noninvasive and economical beam diagnostic.
The principles and techniques for this purpose are investigated for
TESLA (TeV Energy Superconducting Linear Accelerator) cavities at
the injector part of the newly built European XFEL and at FLASH,
two free electron laser facilities based on the TESLA technology. I
have designed and instrumented unconventional beam phase monitors
based on monopole modes in TESLA cavities and demonstrated a
routine resolution of 0.1 degrees with a broadband setup. The best
resolution achieved with this system is 0.03 degrees. The
resolution is largely limited by the signal power. In order to aid
the monitor design and study its performance, I have employed a
coupled circuit model which indicates that the resolution can be
further improved by optimizing the SNR (signal to noise ratio) and
sampling frequency. This is the first type of monitor that is able
to probe online the beam phase directly w.r.t. the accelerating
field in individual accelerating cavities. The system can be used
for long term RF drifts monitoring and also be used to decouple the
phase jitter and drift sources in the injector part of a linac.
Therefore the system can provide valuable information for the low
level RF system. Beam position monitoring based on dipole modes in
TESLA cavities at FLASH was demonstrated for the first time to work
stably over several months with below 5 micrometers resolution. The
improvement is attributed to a focused campaign on various signal
and analysis techniques. These techniques can be transferred with
little effort to the similar system, now under design for the
European XFEL. As a preparation for the beam position monitor for
the third harmonic cavities at the E-XFEL, I have measured and
characterized the HOM spectra for single and
coupled cavities. In
particular there existed no such measurements for eight
coupled
cavities. These measurements pave the way for the instrumentation
of 3.9 GHz cavities and show that the modes are well damped to the
required limit.
Advisors/Committee Members: BERTSCHE, WILLIAM W, Jones, Roger, Bertsche, William.
Subjects/Keywords: Wakefield; Higher Order Modes; Beam diagnostics; BPM; BPhM; LLRF; Coupled Circuit Model; SRF Cavity; European XFEL
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APA ·
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shi, L. (2017). Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:309913
Chicago Manual of Style (16th Edition):
Shi, Liangliang. “Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL.” 2017. Doctoral Dissertation, University of Manchester. Accessed April 14, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:309913.
MLA Handbook (7th Edition):
Shi, Liangliang. “Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL.” 2017. Web. 14 Apr 2021.
Vancouver:
Shi L. Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL. [Internet] [Doctoral dissertation]. University of Manchester; 2017. [cited 2021 Apr 14].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:309913.
Council of Science Editors:
Shi L. Higher-Order-Mode-based Beam Phase and Beam Position
Measurements in Superconducting Accelerating Cavities at the
European XFEL. [Doctoral Dissertation]. University of Manchester; 2017. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:309913
University of Manchester
15.
Shi, Liangliang.
Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL.
Degree: PhD, 2017, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/higherordermodebased-beam-phase-and-beam-position-measurements-in-superconducting-accelerating-cavities-at-the-european-xfel(fb08e233-c957-481d-89dc-88c9ad51a992).html
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.822887
► Instrumentation of higher order modes (HOMs) excited in accelerating cavities for beam phase and position inference provides a noninvasive and economical beam diagnostic. The principles…
(more)
▼ Instrumentation of higher order modes (HOMs) excited in accelerating cavities for beam phase and position inference provides a noninvasive and economical beam diagnostic. The principles and techniques for this purpose are investigated for TESLA (TeV Energy Superconducting Linear Accelerator) cavities at the injector part of the newly built European XFEL and at FLASH, two free electron laser facilities based on the TESLA technology. I have designed and instrumented unconventional beam phase monitors based on monopole modes in TESLA cavities and demonstrated a routine resolution of 0.1 degrees with a broadband setup. The best resolution achieved with this system is 0.03 degrees. The resolution is largely limited by the signal power. In order to aid the monitor design and study its performance, I have employed a coupled circuit model which indicates that the resolution can be further improved by optimizing the SNR (signal to noise ratio) and sampling frequency. This is the first type of monitor that is able to probe online the beam phase directly w.r.t. the accelerating field in individual accelerating cavities. The system can be used for long term RF drifts monitoring and also be used to decouple the phase jitter and drift sources in the injector part of a linac. Therefore the system can provide valuable information for the low level RF system. Beam position monitoring based on dipole modes in TESLA cavities at FLASH was demonstrated for the first time to work stably over several months with below 5 micrometers resolution. The improvement is attributed to a focused campaign on various signal and analysis techniques. These techniques can be transferred with little effort to the similar system, now under design for the European XFEL. As a preparation for the beam position monitor for the third harmonic cavities at the E-XFEL, I have measured and characterized the HOM spectra for single and coupled cavities. In particular there existed no such measurements for eight coupled cavities. These measurements pave the way for the instrumentation of 3.9 GHz cavities and show that the modes are well damped to the required limit.
Subjects/Keywords: European XFEL; SRF Cavity; Coupled Circuit Model; LLRF; Beam diagnostics; BPM; Wakefield; BPhM; Higher Order Modes
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APA (6th Edition):
Shi, L. (2017). Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/higherordermodebased-beam-phase-and-beam-position-measurements-in-superconducting-accelerating-cavities-at-the-european-xfel(fb08e233-c957-481d-89dc-88c9ad51a992).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.822887
Chicago Manual of Style (16th Edition):
Shi, Liangliang. “Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL.” 2017. Doctoral Dissertation, University of Manchester. Accessed April 14, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/higherordermodebased-beam-phase-and-beam-position-measurements-in-superconducting-accelerating-cavities-at-the-european-xfel(fb08e233-c957-481d-89dc-88c9ad51a992).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.822887.
MLA Handbook (7th Edition):
Shi, Liangliang. “Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL.” 2017. Web. 14 Apr 2021.
Vancouver:
Shi L. Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL. [Internet] [Doctoral dissertation]. University of Manchester; 2017. [cited 2021 Apr 14].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/higherordermodebased-beam-phase-and-beam-position-measurements-in-superconducting-accelerating-cavities-at-the-european-xfel(fb08e233-c957-481d-89dc-88c9ad51a992).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.822887.
Council of Science Editors:
Shi L. Higher-order-mode-based beam phase and beam position measurements in superconducting accelerating cavities at the European XFEL. [Doctoral Dissertation]. University of Manchester; 2017. Available from: https://www.research.manchester.ac.uk/portal/en/theses/higherordermodebased-beam-phase-and-beam-position-measurements-in-superconducting-accelerating-cavities-at-the-european-xfel(fb08e233-c957-481d-89dc-88c9ad51a992).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.822887
University of St. Andrews
16.
Hu, Changyu.
Photonic crystal cavity based optical induced transparency.
Degree: 2020, University of St. Andrews
URL: http://hdl.handle.net/10023/20665
► Nowadays, information technology has been deeply integrated in our daily life. However, within its rapid development, it faces a serious bottleneck due to the prohibitive…
(more)
▼ Nowadays, information technology has been deeply integrated in our daily life. However, within its rapid development, it faces a serious bottleneck due to the prohibitive power consumption and limited transmission bandwidth of electrical interconnects. Silicon photonics introduces a potential solution for information technology based on optical communication. In this field, delay-bandwidth devices offer a high bandwidth optical interconnection and low power consumption for the next generation information communication technology. Through introducing the slow light effect, I can realise time domain control and store the light to achieve a new functional component, which is the optical buffer for optical information processing. The optical buffer allows us to control and store the light, using as the optical information process and transit. However, the current optical buffer devices are limited by high optical loss and the ability to produced tunable group delay of the light. In this thesis, I examine different configurations of the
coupled photonic crystal resonator system and then introduce a novel tuneable delay line, based on photonic crystal
cavity structures. Through the optical analog to electromagnetically induced transparency (EIT), an EIT-like transmission spectrum has been achieved in
coupled photonic crystal cavities. By tuning the phase difference between two
coupled resonators and resonance wavelength, I can achieve the desired analog conditions and reach to a maximum group delay of 360 ps. By adding thermal tuning pattern, I have demonstrated a tuning of the group delay of over 120 ps range at a low input power and a maximum delay of 300 ps group delay in
coupled photonic crystal cavities system. All devices are with a footprint at only 200 μm², and with integrated compatibles as well. By employing a new vertical coupling technique, a record low loss 15 dB/ns is presented making this system very promising for practical optical information applications.
Advisors/Committee Members: O’Faolain, Liam (advisor).
Subjects/Keywords: Photonic crystal; Electromagnetically induced transparency; Coupled cavities system; TA1660.H7; Photonic crystals; Transparency; Cavity resonators; Optical interconnects
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APA (6th Edition):
Hu, C. (2020). Photonic crystal cavity based optical induced transparency. (Doctoral Dissertation). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/20665
Chicago Manual of Style (16th Edition):
Hu, Changyu. “Photonic crystal cavity based optical induced transparency.” 2020. Doctoral Dissertation, University of St. Andrews. Accessed April 14, 2021.
http://hdl.handle.net/10023/20665.
MLA Handbook (7th Edition):
Hu, Changyu. “Photonic crystal cavity based optical induced transparency.” 2020. Web. 14 Apr 2021.
Vancouver:
Hu C. Photonic crystal cavity based optical induced transparency. [Internet] [Doctoral dissertation]. University of St. Andrews; 2020. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10023/20665.
Council of Science Editors:
Hu C. Photonic crystal cavity based optical induced transparency. [Doctoral Dissertation]. University of St. Andrews; 2020. Available from: http://hdl.handle.net/10023/20665
NSYSU
17.
Kuo, Hung-Fu.
The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals.
Degree: Master, Electrical Engineering, 2007, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703107-152900
► The communication system using Wavelength-division multiplexing (WDM) allows for better utilization of the spectral bandwidth. Photonic crystals (PhCs) exhibit photonic bandgap (PBG) due to the…
(more)
▼ The communication system using Wavelength-division multiplexing (WDM) allows for better utilization of the spectral bandwidth. Photonic crystals (PhCs) exhibit photonic bandgap (PBG) due to the periodic variation of the dielectric constant and photons with a range of frequencies within the PBG cannot travel through the crystal. By introducing defects into PhCs, it is possible to control the light propagation along certain paths.
In this thesis, the characteristics of
coupled cavity waveguides (CCWs) and drop filter are discussed. Then we propose a multi-channel WDM system based on CCWs. It can be applied in FTTH to filter the wavelengths of 1310, 1490 and 1550 nm in different CCWs and also can make the bandwidth of output wavelength become narrow to filter more wavelengths. In addition, by modulating the size of the resonator on the PhCs, it can drop the particular wavelength into the waveguide. Finally, we proposed a multi-channel drop filter with FHWM 0.8 nm. This device design is leading the way to achieve CWDM specification with 100% drop efficiency, high quality factor and almost no crosstalk. The operations of such an ultra-compact demultiplexer and drop filter based on PhCs are suitable to be used in WDM optical communication systems.
Advisors/Committee Members: Kuo Chih-Wen (committee member), Chen Mao-Hsiung (chair), Wu Yaw-Dong (committee member), Lin Wuu-Wen (chair), Lin Ken-Huang (chair).
Subjects/Keywords: Coupled Cavity Waveguides; Demultiplexer; Wavelength Division Multiplexing; Photonic crystals; Drop Filter
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APA (6th Edition):
Kuo, H. (2007). The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703107-152900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kuo, Hung-Fu. “The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals.” 2007. Thesis, NSYSU. Accessed April 14, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703107-152900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kuo, Hung-Fu. “The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals.” 2007. Web. 14 Apr 2021.
Vancouver:
Kuo H. The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals. [Internet] [Thesis]. NSYSU; 2007. [cited 2021 Apr 14].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703107-152900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kuo H. The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals. [Thesis]. NSYSU; 2007. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0703107-152900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
McMaster University
18.
Khan, Ferdous Karim.
Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers.
Degree: PhD, 2010, McMaster University
URL: http://hdl.handle.net/11375/19078
► A detailed analysis of coupled cavity semiconductor lasers with asymmetric multiple quantum well (AMQW) active regions is presented in this thesis. The analysis involved…
(more)
▼ A detailed analysis of coupled cavity semiconductor lasers with asymmetric multiple quantum well (AMQW) active regions is presented in this thesis. The analysis involved design, fabrication, characterization, and simulation of these devices. Although the coupled cavity devices can be multi sectioned, the devices discussed in this thesis are two sectioned. A below threshold model for an AMQW coupled cavity device is developed. Non-linear fits of the below threshold spectral data to that obtained from the model were used to extract optimized device parameters. These fits helped to create an understanding of the operation of the devices and paved the way for improved device performance. Optimized device parameters obtained from the below threshold model were later used as input parameters in the development of an above threshold model. This model verified the wavelength selection mechanism employed by coupled cavity diode lasers and predicted the longitudinal modes for sets of injection currents. Optical coherence tomography (OCT) is an application where much interest has recently been drawn. The coupled cavity devices fabricated in this work applied with proper modulation of the injection currents and followed by subsequent time averaging have demonstrated short coherence length (-15 μm) and can be an excellent source for synthesized OCT. Rapid wavelength switching (-70 ns, the measurement was limited by detector response time) over the whole range has also been experimentally shown. Because of the high speed (relative to mechanical) wavelength switching ability, AMQW coupled cavity devices have the potential for applications requiring real time measurements including real time synthesized OCT.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: Cassidy, Daniel T., Engineering Physics.
Subjects/Keywords: coupled cavity semiconductor laser; asymmetric multiple quantum well; optical coherence technology; wavelength switching
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APA (6th Edition):
Khan, F. K. (2010). Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/19078
Chicago Manual of Style (16th Edition):
Khan, Ferdous Karim. “Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers.” 2010. Doctoral Dissertation, McMaster University. Accessed April 14, 2021.
http://hdl.handle.net/11375/19078.
MLA Handbook (7th Edition):
Khan, Ferdous Karim. “Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers.” 2010. Web. 14 Apr 2021.
Vancouver:
Khan FK. Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers. [Internet] [Doctoral dissertation]. McMaster University; 2010. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/11375/19078.
Council of Science Editors:
Khan FK. Design, Fabrication and Analysis of Broadly Tunable Asymmetric Multiple Quantum Well Coupled Cavity Diode Lasers. [Doctoral Dissertation]. McMaster University; 2010. Available from: http://hdl.handle.net/11375/19078
19.
Laaroussi, Najma.
Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities.
Degree: Docteur es, Sciences de la matière, 2008, Université Paris-Est
URL: http://www.theses.fr/2008PEST0219
► L'objectif de cette thèse est de contribuer à la simulation numérique des transferts de chaleur par conduction dans les parois, par rayonnement et par convection…
(more)
▼ L'objectif de cette thèse est de contribuer à la simulation numérique des transferts de chaleur par conduction dans les parois, par rayonnement et par convection thermosolutale dans des cavités fermées ou dans des conduites. Dans la plupart des cas pratiques, les trois modes de transfert de chaleur sont fortement couplés lorsque le fluide en mouvement est un mélange de gaz. Le transfert de chaleur par convection naturelle associé à la condensation surfacique dans une cavité à deux dimensions, remplie d'air humide a été étudié numériquement. Les parois verticales, d'épaisseur finie, sont en contact avec une ambiance extérieure froide. La modélisation faiblement compressible permet à la fois de tenir compte de la diminution de la masse du mélange et de la pression thermodynamique. Egalement, une étude de la convection mixte associée à l'évaporation d'un film liquide ruisselant sur les deux parois d'un canal vertical a été menée. Les effets des forces d'Archimède thermique et solutale sur le développement de l'écoulement ont été montrés. Les résultats ont été obtenus en considérant que les propriétés du mélange sont constantes ou basées sur la règle d'un tiers. Deux mélanges binaires de gaz parfaits air-vapeur et air-hexane ont été considérés en vertu de diverses conditions aux limites
The purpose of this thesis is the contribution to the numerical simulation of heat transfer by conduction, radiation and thermosolutal convection in a closed cavity or in a vertical channel. In most practical cases, the three modes of heat transfer are strongly coupled when the fluid in motion is a mixture of gases. Heat transfer by natural convection and surface condensation in two-dimensional enclosures in contact with a cold external ambient through a wall of finite thickness was studied numerically. Special attention was given on the modeling of the flow of a binary mixture consisting of humid air. Low-Mach number assumption was introduced in order to account for decreases in mixture mass and average pressure within the enclosure between the initial and steady states. Also, a numerical investigation was conducted to study mixed convection in a vertical channel with evaporation of thin liquid films on wetted walls. The effects of the thermal and solutal buoyancy forces on the flow field, heat and mass transfer are illustrated. Results were obtained both for variable and for constant properties using the one-third rule. Air-water vapor and air-hexane vapor mixtures, assumed as ideal gases, are considered under various boundary conditions
Advisors/Committee Members: Lauriat, Guy (thesis director).
Subjects/Keywords: Couplage convection naturelle-rayonnement; Convection thermosolutale; Condensation surfacique; Cavitée fermée; Canal vertical; Coupled natural convection-radiation; Thermosolutale convection; Condensation; Evaporation; Surface condensation; Closed cavity; Vertical channel
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APA (6th Edition):
Laaroussi, N. (2008). Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2008PEST0219
Chicago Manual of Style (16th Edition):
Laaroussi, Najma. “Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities.” 2008. Doctoral Dissertation, Université Paris-Est. Accessed April 14, 2021.
http://www.theses.fr/2008PEST0219.
MLA Handbook (7th Edition):
Laaroussi, Najma. “Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities.” 2008. Web. 14 Apr 2021.
Vancouver:
Laaroussi N. Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities. [Internet] [Doctoral dissertation]. Université Paris-Est; 2008. [cited 2021 Apr 14].
Available from: http://www.theses.fr/2008PEST0219.
Council of Science Editors:
Laaroussi N. Contribution à la simulation numérique des transferts de chaleur par conduction, rayonnement et convection thermosolutale dans des cavités : Contribution to the numerical simulation of heat transfert by conduction, radiation and thermosolutal convection in cavities. [Doctoral Dissertation]. Université Paris-Est; 2008. Available from: http://www.theses.fr/2008PEST0219
University of Melbourne
20.
Makin, Melissa I.
The Jaynes-Cummings-Hubbard model.
Degree: 2011, University of Melbourne
URL: http://hdl.handle.net/11343/36516
► This thesis comprises an intensive investigation of the Jaynes-Cummings-Hubbard (JCH)system. This Hamiltonian describes a system of coupled photonic cavities, each cavitycontains a single two-level system.…
(more)
▼ This thesis comprises an intensive investigation of the Jaynes-Cummings-Hubbard (JCH)system. This Hamiltonian describes a system of coupled photonic cavities, each cavitycontains a single two-level system. This system is rich in the physics it contains. Thepresence of the two-level system provides a mechanism by which the photons may interactwith each other, providing an interesting array of non-linear phenomena. Using the meanfieldapproximation, the phase diagram of this system has been shown to display what areeffectively two different phases - a superfluid phase, and a Mott-insulator phase. In thisthesis we show that by using exact diagonalisation for a finite number of cavities, thereis a rich structure to the phases that goes beyond this dual division of phases. We alsogenerate phase diagrams that could be experimentally realised using an ion trap system.Investigating the time dependent properties of the one-dimensional JCH system, we obtainboth localised and delocalised behaviour, despite having only one excitation in the system.In certain limits the 1D JCH system approximates two Heisenberg spin chains. We findit is also possible in the one excitation, one-dimension time dependent case to activelycontrol the location of the excitation, by means of a potential, thus creating all standardcomponents of linear optics: we specifically investigate waveguides and beamsplitters. Finally,we investigate the use of matrix product states (MPS) to study the one-dimensionalJCH system in the time domain. MPS is used to show how two colliding excitations canshow the signature of photon blockade.
Subjects/Keywords: coupled cavity arrays; Jaynes-Cummings-Hubbard model; light-matter interactions; matrix product states; mean-field approximation; phase diagram; photon-photon interactions; quantum mechanics; quantum optics; solid light; time evolution
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APA (6th Edition):
Makin, M. I. (2011). The Jaynes-Cummings-Hubbard model. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/36516
Chicago Manual of Style (16th Edition):
Makin, Melissa I. “The Jaynes-Cummings-Hubbard model.” 2011. Doctoral Dissertation, University of Melbourne. Accessed April 14, 2021.
http://hdl.handle.net/11343/36516.
MLA Handbook (7th Edition):
Makin, Melissa I. “The Jaynes-Cummings-Hubbard model.” 2011. Web. 14 Apr 2021.
Vancouver:
Makin MI. The Jaynes-Cummings-Hubbard model. [Internet] [Doctoral dissertation]. University of Melbourne; 2011. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/11343/36516.
Council of Science Editors:
Makin MI. The Jaynes-Cummings-Hubbard model. [Doctoral Dissertation]. University of Melbourne; 2011. Available from: http://hdl.handle.net/11343/36516
University of Central Florida
21.
Yusuf, Yazid.
Integration Of High-q Filters With Highly Efficient Antennas.
Degree: 2011, University of Central Florida
URL: https://stars.library.ucf.edu/etd/1734
► The integration of high-quality (Q)-factor 3-D filters with highly efficient antennas is addressed in this dissertation. Integration of filters and antennas into inseparable units eliminates…
(more)
▼ The integration of high-quality (Q)-factor 3-D filters with highly efficient antennas is addressed in this dissertation. Integration of filters and antennas into inseparable units eliminates the transitions between the otherwise separate structures resulting in more compact and efficient systems. The compact, highly efficient integrated 3-D filter/antenna systems, enabled by the techniques developed herein, allow for the realization of integrated RF front ends with significantly- reduced form factors. Integration of
cavity filters with slot antennas in a single planar substrate is first demonstrated. Due to the high Q factor of
cavity resonators, the efficiency of the integrated filter/antenna system is found to be the same as that of a reference filter with the same filtering characteristics. This means a near 100% efficient slot antenna is achieved within this integrated filter/antenna system. To further reduce the footprint of the integrated systems, vertically integrated filter/antenna systems are developed. We then demonstrate the integration of
cavity filters with aperture antenna structures which enable larger bandwidths compared with slot antennas. The enhanced bandwidths are made possible through the excitation and radiation of surface waves. To obtain omnidirectional radiation patterns , we integrate
cavity filters with monopole antennas. Finally, the integration of filters with patch antennas is addressed. Unlike the other filter/antenna integration examples presented, in which the antenna is utilized as an equivalent load, the patch antenna provides an additional pole in the filtering function. The presented techniques in this dissertation can be applied for filter/antenna integration in all microwave, and millimeter-wave frequency regions
Advisors/Committee Members: Gong, Xun.
Subjects/Keywords: Antennas (Electronics); Cavity resonators; Coupled mode theory; Microwave filters; Electrical and Computer Engineering; Electrical and Electronics; Engineering; Dissertations, Academic – Engineering and Computer Science, Engineering and Computer Science – Dissertations, Academic
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APA ·
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Export
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APA (6th Edition):
Yusuf, Y. (2011). Integration Of High-q Filters With Highly Efficient Antennas. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/1734
Chicago Manual of Style (16th Edition):
Yusuf, Yazid. “Integration Of High-q Filters With Highly Efficient Antennas.” 2011. Doctoral Dissertation, University of Central Florida. Accessed April 14, 2021.
https://stars.library.ucf.edu/etd/1734.
MLA Handbook (7th Edition):
Yusuf, Yazid. “Integration Of High-q Filters With Highly Efficient Antennas.” 2011. Web. 14 Apr 2021.
Vancouver:
Yusuf Y. Integration Of High-q Filters With Highly Efficient Antennas. [Internet] [Doctoral dissertation]. University of Central Florida; 2011. [cited 2021 Apr 14].
Available from: https://stars.library.ucf.edu/etd/1734.
Council of Science Editors:
Yusuf Y. Integration Of High-q Filters With Highly Efficient Antennas. [Doctoral Dissertation]. University of Central Florida; 2011. Available from: https://stars.library.ucf.edu/etd/1734
Purdue University
22.
Mei, Henry.
Coupled resonator based wireless power transfer for bioelectronics.
Degree: PhD, Biomedical Engineering, 2016, Purdue University
URL: https://docs.lib.purdue.edu/open_access_dissertations/678
► Implantable and wearable bioelectronics provide the ability to monitor and modulate physiological processes. They represent a promising set of technologies that can provide new…
(more)
▼ Implantable and wearable bioelectronics provide the ability to monitor and modulate physiological processes. They represent a promising set of technologies that can provide new treatment for patients or new tools for scientific discovery, such as in long-term studies involving small animals. As these technologies advance, two trends are clear, miniaturization and increased sophistication i.e. multiple channels, wireless bi-directional communication, and responsiveness (closed-loop devices). One primary challenge in realizing miniaturized and sophisticated bioelectronics is powering. Integration and development of wireless power transfer (WPT) technology, however, can overcome this challenge.
In this dissertation, I propose the use of
coupled resonator WPT for bioelectronics and present a new generalized analysis and optimization methodology, derived from complex microwave bandpass filter synthesis, for maximizing and controlling
coupled resonator based WPT performance. This newly developed set of analysis and optimization methods enables system miniaturization while simultaneously achieving the necessary performance to safely power sophisticated bioelectronics. As an application example, a novel coil to coil based
coupled resonator arrangement to wirelessly operate eight surface electromyography sensing devices wrapped circumferentially around an able-bodied arm is developed and demonstrated.
In addition to standard coil to coil based systems, this dissertation also presents a new form of
coupled resonator WPT system built of a large hollow metallic
cavity resonator. By leveraging the analysis and optimization methods developed here, I present a new
cavity resonator WPT system for long-term experiments involving small rodents for the first time. The
cavity resonator based WPT arena exhibits a volume of 60.96 x 60.96 x 30.0 cm3. In comparison to prior state of the art, this
cavity resonator system enables nearly continuous wireless operation of a miniature sophisticated device implanted in a freely behaving rodent within the largest space.
Finally, I present preliminary work, providing the foundation for future studies, to demonstrate the feasibility of treating segments of the human body as a dielectric waveguide resonator. This creates another form of a
coupled resonator system. Preliminary experiments demonstrated optimized
coupled resonator wireless energy transfer into human tissue. The WPT performance achieved to an ultra-miniature sized receive coil (2 mm diameter) is presented. Indeed, optimized
coupled resonator systems, broadened to include
cavity resonator structures and human formed dielectric resonators, can enable the effective use of
coupled resonator based WPT technology to power miniaturized and sophisticated bioelectronics.
Advisors/Committee Members: Pedro P. Irazoqui, Pedro P. Irazoqui, Jennifer Bernhard, Eugenio Culurciello, Zhongming Liu.
Subjects/Keywords: Pure sciences; Applied sciences; Bandpass filter; Bioelectronics; Cavity resonator; Coupled resonator; Evanescent fields; Wireless power transfer; Biomedical Engineering and Bioengineering; Electrical and Computer Engineering; Electromagnetics and Photonics
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APA (6th Edition):
Mei, H. (2016). Coupled resonator based wireless power transfer for bioelectronics. (Doctoral Dissertation). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_dissertations/678
Chicago Manual of Style (16th Edition):
Mei, Henry. “Coupled resonator based wireless power transfer for bioelectronics.” 2016. Doctoral Dissertation, Purdue University. Accessed April 14, 2021.
https://docs.lib.purdue.edu/open_access_dissertations/678.
MLA Handbook (7th Edition):
Mei, Henry. “Coupled resonator based wireless power transfer for bioelectronics.” 2016. Web. 14 Apr 2021.
Vancouver:
Mei H. Coupled resonator based wireless power transfer for bioelectronics. [Internet] [Doctoral dissertation]. Purdue University; 2016. [cited 2021 Apr 14].
Available from: https://docs.lib.purdue.edu/open_access_dissertations/678.
Council of Science Editors:
Mei H. Coupled resonator based wireless power transfer for bioelectronics. [Doctoral Dissertation]. Purdue University; 2016. Available from: https://docs.lib.purdue.edu/open_access_dissertations/678
Universidade Estadual de Campinas
23.
Luiz, Gustavo de Oliveira, 1988-.
Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados.
Degree: Instituto de Física Gleb Wataghin; Programa de Pós-Graduação em Física, 2017, Universidade Estadual de Campinas
URL: LUIZ,
Gustavo
de
Oliveira.
Dynamics
of
coupled
micro-oscillators:
Dinâmica
de
micro-osciladores
acoplados.
2017.
137
f.
Tese
(doutorado)
-
Universidade
Estadual
de
Campinas,
Instituto
de
Física
Gleb
Wataghin,
Campinas,
SP.
Disponível
em:
<http://www.repositorio.unicamp.br/handle/REPOSIP/325686>.
Acesso
em:
13
jun.
2019.
;
http://repositorio.unicamp.br/jspui/handle/REPOSIP/325686
► Orientador: Gustavo Silva Wiederhecker
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2019-06-13T10:33:11Z (GMT). No. of…
(more)
▼ Orientador: Gustavo Silva Wiederhecker
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2019-06-13T10:33:11Z (GMT). No. of bitstreams: 1 Luiz_GustavoDeOliveira_D.pdf: 5507367 bytes, checksum: 506db63a5a93a33d67a84dbb1f7b33ce (MD5) Previous issue date: 2017
Resumo: Nas últimas décadas a optomecânica de microcavidades chamou a atenção de cientistas e engenheiros, que encontraram na interação entre luz e ondas acústicas aplicações que variam de sensores de massa com resolução atômica, até a preparação de estados quânticos de osciladores harmônicos mesoscópicos, passando por simuladores quânticos, filtros ópticos controláveis opticamente, criação de estados topológicos para luz e fônons, apenas citando alguns exemplos. Apesar das diversas demonstrações de vários dispositivos, sendo discos e cristais fotônicos os formatos mais comuns, há ainda um grande esforço no sentido de
aperfeiçoá-los reduzindo perdas ópticas e mecânicas e suprimindo outros fenômenos de óptica não-linear, como absorção de dois fótons, que podem impedir seu funcionamento apropriado. Como ressonadores ópticos e mecânicos tipicamente compartilham a mesma estrutura nestes dispositivos, seus projetos são acoplados, dificultando o aprimoramento independente de cada um. Nesta tese usamos dispositivos optomecânicos de campo próximo, cuja interação entre modos mecânicos e ópticos se dá através do campo evanescente do último, para desacoplar o projeto mecânico do óptico, o que nos permitiu estudar a otimização do ressonador mecânico sem qualquer efeito sobre a cavidade óptica. Com um ressonador mecânico de silício composto por dois osciladores acoplados, pudemos demonstrar que o correto equilíbrio das massas de cada oscilador é um método simples e eficiente para suprimir as perdas devido à radiação de energia mecânica para o substrato na escala de frequência de 50 MHz. Este processo permitiu
que fatores de qualidade limitados por perdas relacionadas ao material e à superfície, da ordem de 10 mil à temperatura ambiente e de 50 mil a aproximadamente 25 K, fossem obtidos. Também observamos nestes dispositivos o fenômeno de auto-pulsação, que apresenta uma dinâmica própria tão interessante quanto a optomecânica, apesar de impedir a operação apropriada dos osciladores optomecânicos. Estudamos este fenômeno separadamente e demonstramos que estes pulsos, ocorrendo em duas cavidades ópticas acopladas por seus campos evanescentes, podem sincronizar com o campo óptico sendo o único intermediador. Ambas as demonstrações têm implicações importantes, abrindo caminho para o desenvolvimento de novas plataformas de interesse tanto científico quanto tecnológico, como estruturas para o estudo de estados topológicos para a luz e para ondas acústicas e geradores de sinal de radio-frequência de alto desempenho. Além disso, os dispositivos foram todos produzidos em uma fábrica comercial, o
que também demonstra que sua fabricação está pronta para ser escalada para produção em massa
Cavity optomechanics…
Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS, Wiederhecker, Gustavo Silva, 1981-, Dainese Júnior, Paulo Clóvis, Iikawa, Fernando, Leonel, Edson Denis, Lira, Hugo Leonardo Rocha de.
Subjects/Keywords: Teoria de modos acoplados; Optomecânica de cavidade; Dissipação de energia; Oscilações não-lineares; Silício; Coupled mode theory; Cavity optomechanics; Energy dissipation; Nonlinear oscillations; Silicon
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APA (6th Edition):
Luiz, Gustavo de Oliveira, 1. (2017). Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados. (Doctoral Dissertation). Universidade Estadual de Campinas. Retrieved from LUIZ, Gustavo de Oliveira. Dynamics of coupled micro-oscillators: Dinâmica de micro-osciladores acoplados. 2017. 137 f. Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/325686>. Acesso em: 13 jun. 2019. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/325686
Chicago Manual of Style (16th Edition):
Luiz, Gustavo de Oliveira, 1988-. “Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados.” 2017. Doctoral Dissertation, Universidade Estadual de Campinas. Accessed April 14, 2021.
LUIZ, Gustavo de Oliveira. Dynamics of coupled micro-oscillators: Dinâmica de micro-osciladores acoplados. 2017. 137 f. Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/325686>. Acesso em: 13 jun. 2019. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/325686.
MLA Handbook (7th Edition):
Luiz, Gustavo de Oliveira, 1988-. “Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados.” 2017. Web. 14 Apr 2021.
Vancouver:
Luiz, Gustavo de Oliveira 1. Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados. [Internet] [Doctoral dissertation]. Universidade Estadual de Campinas; 2017. [cited 2021 Apr 14].
Available from: LUIZ, Gustavo de Oliveira. Dynamics of coupled micro-oscillators: Dinâmica de micro-osciladores acoplados. 2017. 137 f. Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/325686>. Acesso em: 13 jun. 2019. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/325686.
Council of Science Editors:
Luiz, Gustavo de Oliveira 1. Dynamics of coupled micro-oscillators : Dinâmica de micro-osciladores acoplados. [Doctoral Dissertation]. Universidade Estadual de Campinas; 2017. Available from: LUIZ, Gustavo de Oliveira. Dynamics of coupled micro-oscillators: Dinâmica de micro-osciladores acoplados. 2017. 137 f. Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/325686>. Acesso em: 13 jun. 2019. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/325686
Queens University
24.
Seifoory, Hossein.
The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
.
Degree: Physics, Engineering Physics and Astronomy, Queens University
URL: http://hdl.handle.net/1974/26514
► Nonclassical states of light possess unique properties such as squeezing, antibunching, and entanglement, which have led to various interesting applications in quantum computing, quantum teleportation,…
(more)
▼ Nonclassical states of light possess unique properties such as squeezing, antibunching, and entanglement, which have led to various interesting applications in quantum computing, quantum teleportation, and quantum information. However, practical implementation of some of these potential applications are hindered due to our lack of insight into how to treat loss in the system. The inclusion of loss is very important, as it can in some cases largely destroy the nonclassical properties of the light.
The focus of this thesis is on squeezed states, as these are one of the most useful and important quantum states of light. First, I present a theoretical treatment of the nonclassical properties of squeezed states generated via parametric down conversion in a leaky cavity. By solving the Lindblad master equation for such a system, I analytically demonstrate that the exact time dependent solution is a squeezed thermal state. In addition, I examine the dynamics of generated nonclassical states of light in lossy coupled-cavity systems. I then apply the formalism developed to a coupled resonator optical waveguide structure and present the results for squeezed vacuum states. I next examine the coupled-cavity optical waveguide system as a platform to produce counterpropagating continuous variable entangled states. Using a tight-binding approximation, I develop analytic time-dependent expressions for the number of photons in each cavity, as well as for the correlation variance between the photons in different pairs of cavities. These expressions can be used to engineer the pumping configurations as well as the physical properties of the structure. Finally, employing a numerical singular value decomposition method, I show how the biphoton wave function can be Schmidt decomposed numerically, which together with the previously-developed analytic expressions provides a powerful computational platform. This is important as it can not only be used to check the validity of the approximations made in obtaining analytic expressions but can also be used to explore some interesting cases that were not possible to treat analytically.
Subjects/Keywords: Coupled-cavity system
;
Nonclassical light
;
Squeezed state
;
Continuous variable entanglement
;
Coupled resonator optical waveguide
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Seifoory, H. (n.d.). The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/26514
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Seifoory, Hossein. “The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
.” Thesis, Queens University. Accessed April 14, 2021.
http://hdl.handle.net/1974/26514.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Seifoory, Hossein. “The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
.” Web. 14 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Seifoory H. The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
. [Internet] [Thesis]. Queens University; [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1974/26514.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Seifoory H. The Dynamics of Quantum States of Light in Lossy Coupled-Cavity Systems
. [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/26514
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Brno University of Technology
25.
Benites Ayala, Ivan Alejandro.
Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/177670
► This master's thesis presents the design and the realization of a low noise amplifier (LNA) for the S band of radio frequency spectrum from 2.3…
(more)
▼ This master's thesis presents the design and the realization of a low noise amplifier (LNA) for the S band of radio frequency spectrum from 2.3 GHz to 2.4 GHz. This thesis is mainly focused on stability and impedance matching networks study. Ansoft Designer and ANSYS HFSS programs are used for this design to simulate the LNA. Different low noise devices are simulated in order to find the best results for the final design. Moreover, a coaxial
cavity resonator is designed in the input of the LNA and works as a band pass filter. Finally, the LNA is fabricated and its properties compared with the simulation results.
Advisors/Committee Members: Kasal, Miroslav (advisor), Vondra, Vlastimil (referee).
Subjects/Keywords: Nízkošumový zesilovač; PMA2-33LN+ monolitický zesilovač; pracovní bod; stabilita; šumové prizpůsobení; šumové číslo; dutinový rezonátor; interdigitální filtr.; Low noise amplifier; PMA2-33LN+ monolithic amplifier; operating point; stability; matching network; noise figure; coaxial cavity resonator; interdigital band pass filter.
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APA ·
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Manager
APA (6th Edition):
Benites Ayala, I. A. (2019). Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/177670
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Benites Ayala, Ivan Alejandro. “Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band.” 2019. Thesis, Brno University of Technology. Accessed April 14, 2021.
http://hdl.handle.net/11012/177670.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Benites Ayala, Ivan Alejandro. “Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band.” 2019. Web. 14 Apr 2021.
Vancouver:
Benites Ayala IA. Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/11012/177670.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Benites Ayala IA. Nízkošumový zesilovač pro pásmo S: Low Noise Amplifier for the S Band. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/177670
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Marques, Rafael.
Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido.
Degree: 2017, Universidade Federal de Juiz de Fora (UFJF); Programa de Pós-graduação em Química; UFJF; Brasil; ICE – Instituto de Ciências Exatas
URL: https://repositorio.ufjf.br/jspui/handle/ufjf/6057
► CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Esta tese de doutorado aborda o preparo, a caracterização e a utilização de fases estacionárias…
(more)
▼ CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Esta tese de doutorado aborda o preparo, a caracterização e a utilização de fases estacionárias monolíticas para uso em colunas de separação cromatográfica em escala capilar. As fases estacionárias foram preparadas pela polimerização do monômero 3-(metacriloxipropil)-trimetoxisilano em duas etapas envolvendo primeiramente um processo sol-gel e depois um processo de adição radicalar fotoiniciado. A fotopolimerização foi feita in situ em capilares de sílica fundida transparentes à radiação UV com 100 μm de diâmetro interno. As colunas produzidas foram aplicadas qualitativamente com sucesso na separação de cinco hidrocarbonetos policíclicos aromáticos e três hormônios esteroides, tanto por cromatografia a líquido capilar quanto por eletrocromatografia capilar em um equipamento de eletroforese capilar. A eletrocromatografia foi usada para analisar quantitativamente uma amostra de
emulsão transdérmica contendo estriol e 17-β-estradiol. Como tentativa de melhorar a separação entre alguns analitos, foi feita a modificação do polímero adicionando o monômero benzil metacrilato, porém sem sucesso. As colunas foram caracterizadas com relação à sua homogeneidade física usando um microscópio óptico e um detector condutométrico sem contato capacitivamente acoplado. O detector foi usado como um scanner não invasivo deslocando-se longitudinalmente ao longo da coluna externamente ao capilar. A caracterização química do polímero foi feita através da espectroscopia de ressonância magnética nuclear no estado sólido dos núcleos de 13C e de 29Si. Foi possível propor uma estrutura para o arranjo da cadeia carbônica e o grau de substituição do grupo silil indicando a reticulação das cadeias poliméricas através da formação de dímeros e trímeros condensação de grupos alcoxisilanos.
This doctoral thesis adresses the preparation, characterization and use of monolithic stationary
phases for chromatographic separation columns in capillary scale. The stationary phases were prepared by polymerizing the 3- (methacryloxypropyl) trimethoxysilane monomer in two steps involving a sol-gel process followed by a photoinitiated radical addition. The photopolymerization was carried out in UV transparent coating fused silica capillaries with 100 μm of internal diameter. The columns were applied in the qualitative separation of five polycyclic aromatic hydrocarbons and three steroid hormones, both by capillary liquid chromatography and capillary electrochromatography in a capillary electrophoresis equipment. Electrochromatography was used to quantitative analyzis of a transdermal emulsion sample containing estriol and 17-β-estradiol. In an attempt to improve the separation between some analytes, the polymer was modified by adding the benzyl methacrylate monomer, but without success. The columns were characterized with respect to their physical homogeneity using an optical
microscope and a capacitively coupled contactless conductivity detector. The…
Advisors/Committee Members: Oliveira, Marcone Augusto Leal de, Lago, Claudimir Lucio do, Bottoli, Carla Beatriz Grespan, Vaz, Fernando Antonio Simas, Matos, Maria Auxiliadora Costa, Andrade, Gustavo Fernandes Souza.
Subjects/Keywords: CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA; Fase estacionária monolítica; Eletrocromatografia capilar; Cromatografia a líquido; Detector condutométrico sem contato capacitivamente acoplado; Espectroscopia de ressonância magnética nuclear; Monolithic stationary phase; Capillary electrochromatography; Liquid chromatography; Capacitive coupled contactless conductivity detector; Nuclear magnetic resonance spectroscopy
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APA ·
Chicago ·
MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Marques, R. (2017). Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido. (Doctoral Dissertation). Universidade Federal de Juiz de Fora (UFJF); Programa de Pós-graduação em Química; UFJF; Brasil; ICE – Instituto de Ciências Exatas. Retrieved from https://repositorio.ufjf.br/jspui/handle/ufjf/6057
Chicago Manual of Style (16th Edition):
Marques, Rafael. “Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido.” 2017. Doctoral Dissertation, Universidade Federal de Juiz de Fora (UFJF); Programa de Pós-graduação em Química; UFJF; Brasil; ICE – Instituto de Ciências Exatas. Accessed April 14, 2021.
https://repositorio.ufjf.br/jspui/handle/ufjf/6057.
MLA Handbook (7th Edition):
Marques, Rafael. “Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido.” 2017. Web. 14 Apr 2021.
Vancouver:
Marques R. Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido. [Internet] [Doctoral dissertation]. Universidade Federal de Juiz de Fora (UFJF); Programa de Pós-graduação em Química; UFJF; Brasil; ICE – Instituto de Ciências Exatas; 2017. [cited 2021 Apr 14].
Available from: https://repositorio.ufjf.br/jspui/handle/ufjf/6057.
Council of Science Editors:
Marques R. Caracterização não invasiva de fase estacionária monolítica para uso em eletrocromatografia capilar e nano-cromatografia a líquido. [Doctoral Dissertation]. Universidade Federal de Juiz de Fora (UFJF); Programa de Pós-graduação em Química; UFJF; Brasil; ICE – Instituto de Ciências Exatas; 2017. Available from: https://repositorio.ufjf.br/jspui/handle/ufjf/6057
27.
Li, Yanqiu.
Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena.
Degree: PhD, Physics, 2009, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:178/
► Access to ultrafast physical phenomena through the use of real-time laser spectroscopy is a vibrant field in science and engineering today. Ultrashort laser pulses with…
(more)
▼ Access to ultrafast physical phenomena through the use
of real-time laser spectroscopy is a vibrant field in science and
engineering today. Ultrashort laser pulses with controlled energy
of sub-picosecond duration can be used to probe fastest events in
atomic, molecular, solid state and biochemical systems. In this
thesis, we employed ultrafast lasers for light-matter interaction
of selected ultrafast electronic, magnetic and acoustic processes
in distinctly different media. One area of interest in this thesis
is the dynamics of electron spins in ferromagnetic materials.
Previous work in our group successfully demonstrated ultrafast
coherent magnetization rotation in the ferromagnetic thin film
triggered by ultrafast optical pulses. In this thesis we extended
the study of ultrafast spin dynamics to magnetic nanostructures. In
another material system, a nanocomposite of ferromagnetic and noble
metals, we show how noble metal nanoparticles are capable of
greatly enhancing the magneto-optical response of the hybrid
nanomaterials when excited at their plasmonic resonance wavelength.
We describe the physics that enables the plasmonic resonance
behavior of the noble-metal nanoparticles to improve their
magnetooptical response. While initially focusing on measurements
of the transient magnetooptical effect in the nanocomposites by
ultrashort pulse optical techniques, we discovered a strongly
competing signature which originated from optically induced
acoustic vibration of the nanoparticles. The pronounced
acousto-optical transient phenomena led to the study of laser
picosecond ultrasonics. In this part of work we address the
challenges in the conventional picosecond ultrasonic measurements
where the opto-acoustic signals acquired as modulated reflection of
the time-delayed probe beams are small due to small piezo-optic
coefficients. We have investigated the use of a Fabry-Perot optical
cavity to enhance these signals. The
cavity is formed between a
distributed Bragg reflector and a metal thin film sample.
Experimental results for Al and Cu films show enhancement of
acoustic signals by up to two orders of magnitude. This technique
also makes it possible to determine the actual pulse shape of the
returning acoustic echoes inside the metal thin films, thereby
enriching the total amount of information acquired in picosecond
ultrasonic experiments.
Advisors/Committee Members: Nurmikko, Arto (director), Maris, Humphrey (director), Zia, Rashid (reader).
Subjects/Keywords: Optical Cavity
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, Y. (2009). Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:178/
Chicago Manual of Style (16th Edition):
Li, Yanqiu. “Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena.” 2009. Doctoral Dissertation, Brown University. Accessed April 14, 2021.
https://repository.library.brown.edu/studio/item/bdr:178/.
MLA Handbook (7th Edition):
Li, Yanqiu. “Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena.” 2009. Web. 14 Apr 2021.
Vancouver:
Li Y. Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena. [Internet] [Doctoral dissertation]. Brown University; 2009. [cited 2021 Apr 14].
Available from: https://repository.library.brown.edu/studio/item/bdr:178/.
Council of Science Editors:
Li Y. Ultrafast Phenomena on the Nanoscale in Solids: From
Magnetic to Acoustic Phenomena. [Doctoral Dissertation]. Brown University; 2009. Available from: https://repository.library.brown.edu/studio/item/bdr:178/
North Carolina State University
28.
Shah, Chintan Hemendra.
Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line.
Degree: MS, Electrical Engineering, 2009, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/2850
► As data frequency increases beyond several Gbps range, low power chip to chip communication becomes more critical. The concept researched in this thesis is inductively…
(more)
▼ As data frequency increases beyond several Gbps range, low power chip to chip communication becomes more critical. The concept researched in this thesis is inductively
coupled interconnect (LCI) over short length transmission line. The data will be transmitted across a 10 cm differential microstrip line on FR-4 material with a transformer on each side of the line. The transmitter and receiver circuits are designed in TSMC 0.18μm process technology and can operate at 2.5 Gbps. The power consumption of the design is 5.53 mW at 2.5 Gbps which yields around 2.21 mW.Gb-1.s-1. This design can achieve BER of less than 10-12. The inductive coupling will reduce DC power because the low frequency DC component of the signal will be blocked by coupling inductors. The power consumed by this design is lower than most of the conventional I/Os that use physical contact interconnects. An H-bridge current steering driver is used at the transmitter and a differential amplifier and Sense-amp Flip flop is used at the receiver.
Advisors/Committee Members: Dr. Paul Franzon, Committee Chair (advisor), Dr. Kevin Gard, Committee Member (advisor), Dr. Michael Steer, Committee Member (advisor).
Subjects/Keywords: inductively coupled; AC coupled; LCI; inductive coupled
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APA (6th Edition):
Shah, C. H. (2009). Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/2850
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shah, Chintan Hemendra. “Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line.” 2009. Thesis, North Carolina State University. Accessed April 14, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/2850.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shah, Chintan Hemendra. “Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line.” 2009. Web. 14 Apr 2021.
Vancouver:
Shah CH. Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line. [Internet] [Thesis]. North Carolina State University; 2009. [cited 2021 Apr 14].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/2850.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shah CH. Inductively Coupled Interconnect for Chip to Chip Communication over Transmission Line. [Thesis]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2850
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
29.
Heine, Robert Gerd.
Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta.
Degree: 2006, Technische Universität Dortmund
URL: http://dx.doi.org/10.17877/DE290R-24
► In einem Elektronenbeschleuniger werden Hochfrequenz-Hohlraumresonatoren zur Beschleunigung der Elektronen und zum Ausgleich des Energieverlustes der Elektronen durch Abstrahlung von Synchrotronstrahlung verwendet. Die höheren Moden dieser…
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▼ In einem Elektronenbeschleuniger werden Hochfrequenz-Hohlraumresonatoren zur Beschleunigung der Elektronen und zum Ausgleich des Energieverlustes der Elektronen durch Abstrahlung von Synchrotronstrahlung verwendet. Die höheren Moden dieser Resonatoren können den Elektronenstrahl zu unerwünschten kollektiven Oszillationen (
Coupled-Bunch Moden) anregen und ihn so in eine Instabilität treiben. In dieser Arbeit wird der Einfluss verschiedener zur Beschleunigung von Elektronen verwendeter Hohlraumresonatoren auf das Stabilitätsverhalten des Teilchenstrahl im Speicherring Delta untersucht. Die Experimente fanden bei verschiedenen Teilchenenergien und Strahlströmen des Beschleunigers mit zwei unterschiedlichen in den Beschleuniger eingebauten Resonatoren statt, wobei der Teilchenstrahl auf durch höhere Resonatormoden induzierte Strahloszillation vermessen wurde. Weiterhin wurde der Einfluss der Füllstruktur des Strahls auf das Anregungsspektrum der
Coupled-Bunch Moden untersucht. Zusammenhänge der gemessenen Spektren sowohl mit Resonatormoden, als auch mit der Füllstruktur konnten nachgewiesen werden.
Advisors/Committee Members: Weis, T. (advisor), Dietrich, J. (other).
Subjects/Keywords: Beschleuniger; Kollektive Schwingungen; Strahlinstabilitäten; Hohlraumresonatoren; Modendämpfung; Coupled-Bunch Moden; Particle accelerator; Collective oscillation; Beam instability; Cavity resonator; Mode damping; 530
Record Details
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APA ·
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MLA ·
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CSE |
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Manager
APA (6th Edition):
Heine, R. G. (2006). Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta. (Doctoral Dissertation). Technische Universität Dortmund. Retrieved from http://dx.doi.org/10.17877/DE290R-24
Chicago Manual of Style (16th Edition):
Heine, Robert Gerd. “Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta.” 2006. Doctoral Dissertation, Technische Universität Dortmund. Accessed April 14, 2021.
http://dx.doi.org/10.17877/DE290R-24.
MLA Handbook (7th Edition):
Heine, Robert Gerd. “Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta.” 2006. Web. 14 Apr 2021.
Vancouver:
Heine RG. Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta. [Internet] [Doctoral dissertation]. Technische Universität Dortmund; 2006. [cited 2021 Apr 14].
Available from: http://dx.doi.org/10.17877/DE290R-24.
Council of Science Editors:
Heine RG. Untersuchung der Wechselwirkung intensiver Elektronenstrahlen mit höheren Resonatormoden an Delta. [Doctoral Dissertation]. Technische Universität Dortmund; 2006. Available from: http://dx.doi.org/10.17877/DE290R-24
University of Central Florida
30.
Lee, Shinwook.
High Power Mode-locked Semiconductor Lasers And Their Applications.
Degree: 2008, University of Central Florida
URL: https://stars.library.ucf.edu/etd/3722
► In this dissertation, a novel semiconductor mode-locked oscillator which is an extension of eXtreme Chirped Pulse Amplification (XCPA) is investigated. An eXtreme Chirped Pulse Oscillator…
(more)
▼ In this dissertation, a novel semiconductor mode-locked oscillator which is an extension of eXtreme Chirped Pulse Amplification (XCPA) is investigated. An eXtreme Chirped Pulse Oscillator (XCPO) implemented with a Theta
cavity also based on a semiconductor gain is presented for generating more than 30ns frequency-swept pulses with more than 100pJ of pulse energy and 3.6ps compressed pulses directly from the oscillator. The XCPO shows the two distinct characteristics which are the scalability of the output energy and the mode-locked spectrum with respect to repetition rate. The laser
cavity design allows for low repetition rate operation <100MHz. The
cavity significantly reduces nonlinear carrier dynamics, integrated self phase modulation (SPM), and fast gain recovery in a Semiconductor optical Amplifier (SOA). Secondly, a functional device, called a Grating
Coupled Surface Emitting Laser (GCSEL) is investigated. For the first time, passive and hybrid mode-locking of a GCSEL is achieved by using saturable absorption in the passive section of GCSEL. To verify the present limitation of the GCSEL for passive and hybrid mode-locking, a dispersion matched
cavity is explored. In addition, a Grating
Coupled surface emitting Semiconductor Optical Amplifier (GCSOA) is also investigated to achieve high energy pulse. An energy extraction experiment for GCSOA using stretched pulses generated from the colliding pulse semiconductor mode-locked laser via a chirped fiber bragg grating, which exploits the XCPA advantages is also demonstrated. Finally, passive optical
cavity amplification using an enhancement
cavity is presented. In order to achieve the interferometric stability, the Hänsch-Couillaud Method is employed to stabilize the passive optical
cavity. The astigmatism-free optical
cavity employing an acousto-optic modulator (AOM) is designed and demonstrated. In the passive optical
cavity, a 7.2 of amplification factor is achieved with a 50 KHz dumping rate.
Advisors/Committee Members: Delfyett, Peter.
Subjects/Keywords: Mode-locked laser; Semiconductor; Grating-coupled Surface-emitting Laser; Passive Optical Cavity; Electromagnetics and Photonics; Optics
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Lee, S. (2008). High Power Mode-locked Semiconductor Lasers And Their Applications. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/3722
Chicago Manual of Style (16th Edition):
Lee, Shinwook. “High Power Mode-locked Semiconductor Lasers And Their Applications.” 2008. Doctoral Dissertation, University of Central Florida. Accessed April 14, 2021.
https://stars.library.ucf.edu/etd/3722.
MLA Handbook (7th Edition):
Lee, Shinwook. “High Power Mode-locked Semiconductor Lasers And Their Applications.” 2008. Web. 14 Apr 2021.
Vancouver:
Lee S. High Power Mode-locked Semiconductor Lasers And Their Applications. [Internet] [Doctoral dissertation]. University of Central Florida; 2008. [cited 2021 Apr 14].
Available from: https://stars.library.ucf.edu/etd/3722.
Council of Science Editors:
Lee S. High Power Mode-locked Semiconductor Lasers And Their Applications. [Doctoral Dissertation]. University of Central Florida; 2008. Available from: https://stars.library.ucf.edu/etd/3722
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