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Penn State University
1.
Yue, Taiwei.
ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.
Degree: 2018, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15459txy143
► In this dissertation, the design, analysis, and demonstration of multiple advanced compact and low-profile antennas with enhanced functionalities are presented with operational frequency bands ranging…
(more)
▼ In this dissertation, the design, analysis, and demonstration of multiple advanced compact and low-profile antennas with enhanced functionalities are presented with operational frequency bands ranging from microwave frequencies to the terahertz regime. Basic background knowledge is reviewed first in Chapter 1. In Chapter 2, three single-band antennas with compact sizes operating in the 4.0 GHz band are proposed. Specifically, the first two designs are linearly-polarized (LP) antennas with fractional bandwidths of more than 10% and unidirectional radiation patterns. The third design in Chapter 2 is a circularly-polarized (CP) antenna with an operational bandwidth exceeding 9% and a unidirectional radiation pattern. In Chapter 3, the design methodology of a dual-band antenna is introduced. The proposed LP antenna functions at both the 1.9 and 2.5 GHz frequency bands with unidirectional radiating characteristics. An ultra-compact footprint is achieved by the proposed antenna by virtue of rectangular complementary split ring resonator (CSRR) loadings, which also contributes to the dual-band functionality. In Chapter 4, a dual-band dual-sense CP antenna that operates at 1.9 and 2.5 GHz is proposed. The bi-anisotropic characteristic of the circular CSRR resonators is utilized in antenna engineering for the first time to realize the dual-band dual-sense CP radiation at broadside. Moreover, the size of the antenna is smaller than most of its counterparts reported in the literature. In Chapter 5, a highly miniaturized wideband wearable antenna with filtering characteristics is proposed for the 2.4 GHz industry, scientific, and medical (ISM) band based on the substrate-integrated-waveguide (SIW) technology. More importantly, the SIW structure is based on Eutectic Gallium-Indium (EGaIn) liquid metal and a flexible Styrene Ethylene Butylene Styrene (SEBS) polymer. This represents the first application of these flexible materials in antenna engineering. In Chapter 6, compact optical nanoantennas, referred to as surface plasma (SP) wave generators in this dissertation, are introduced to realize the generation of reconfigurable directional SP waves. In summary, these antennas with miniaturized volumes and advanced functionalities are promising candidates for integration into various modern communication systems.
Advisors/Committee Members: Douglas Henry Werner, Dissertation Advisor/Co-Advisor, Douglas Henry Werner, Committee Chair/Co-Chair, Ram Mohan Narayanan, Committee Member, Pingjuan Li Werner, Committee Member, Ramakrishnan Rajagopalan, Outside Member.
Subjects/Keywords: Antenna; Metasurface
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APA (6th Edition):
Yue, T. (2018). ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15459txy143
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):
Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Thesis, Penn State University. Accessed April 13, 2021.
https://submit-etda.libraries.psu.edu/catalog/15459txy143.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yue, Taiwei. “ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS.” 2018. Web. 13 Apr 2021.
Vancouver:
Yue T. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Apr 13].
Available from: https://submit-etda.libraries.psu.edu/catalog/15459txy143.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yue T. ADVANCED COMPACT, LOW PROFILE ANTENNA DESIGNS FOR MODERN COMMUNICATION SYSTEMS. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15459txy143
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Tulane University
2.
LIN,SHUAI.
PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA.
Degree: 2019, Tulane University
URL: https://digitallibrary.tulane.edu/islandora/object/tulane:94849
► [email protected]
In the past decades, the terahertz science and technology have been extensively studied due to their potential applications in fundamental physics, material characterization, communication,…
(more)
▼ [email protected]
In the past decades, the terahertz science and technology have been extensively studied due to their potential applications in fundamental physics, material characterization, communication, sensing and imaging. Although a lot terahertz optical devices have been proposed recently, but efficient, high-performance terahertz optical devices are still in great demand. With the development of plasmonic research and nano-/micro- fabrication techniques, plasmon and metasurface based terahertz optical devices demonstrate their capacity to fit these needs. It is crucial to learn the plasmon and metasurface mediated terahertz optical phenomena for designing such terahertz optical devices. This thesis will explore several plasmon and metasurface mediated terahertz optical phenomena and propose possible solutions for the design of terahertz optical devices.
The plasmonic resonant responses of sub-wavelength metallic and dielectric gratings on Indium Antimonide (InSb) are first studied. The designed sub-wavelength metasurface structures are able to couple normal incident terahertz wave with the surface standing plasmon modes whose propagation constant is controlled by the period of the structure. The excited resonant mode on the metallic grating structure is sensitive to its ambient environment which could be potentially applied in molecular sensing. The high-refractive index dielectric grating on InSb wafer enables us to intentionally tune the plasmonic response of the structure which offers more flexibility for terahertz devices.
The non-reciprocal reflection and reciprocal transmission of InSb wafer under weak external magnetic field is reported then. The surface plasmon theory of this non-reciprocal reflection and reciprocal transmission is reviewed and confirmed by the experiments. A high-performance THz optical isolator is then proposed based on this non-reciprocal reflection.
A novel experiments setup to measure the quadratic terahertz nonlinearities using second-harmonic lock-in detection is proposed. The experimental method is demonstrated by measuring the THz Kerr effect on (110) Gallium Phosphide (GaP) crystal. The experimental design is extended to measure the second-harmonic generation of non-centrosymmetric media. We also design a split-ring-resonator (SRR) metasurface to enhance the second-harmonic generation from non-centrosymmetric media.
1
SHUAI LIN
Advisors/Committee Members: TALBAYEV,DIYAR (Thesis advisor), School of Science & Engineering Physics and Engineering Physics (Degree granting institution).
Subjects/Keywords: Terahertz; Metasurface; Optics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
LIN,SHUAI. (2019). PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA. (Thesis). Tulane University. Retrieved from https://digitallibrary.tulane.edu/islandora/object/tulane:94849
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
LIN,SHUAI. “PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA.” 2019. Thesis, Tulane University. Accessed April 13, 2021.
https://digitallibrary.tulane.edu/islandora/object/tulane:94849.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
LIN,SHUAI. “PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA.” 2019. Web. 13 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
LIN,SHUAI. PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA. [Internet] [Thesis]. Tulane University; 2019. [cited 2021 Apr 13].
Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:94849.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
LIN,SHUAI. PLASMON AND METASURFACE MEDIATED TERAHERTZ OPTICAL PHENOMENA. [Thesis]. Tulane University; 2019. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:94849
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington
3.
Colburn, Shane.
Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing.
Degree: 2017, University of Washington
URL: http://hdl.handle.net/1773/40037
► Metasurfaces, the 2D analogue of bulk metamaterials, show incredible promise for achieving nanoscale optical components that could support the growing infrastructure for the Internet of…
(more)
▼ Metasurfaces, the 2D analogue of bulk metamaterials, show incredible promise for achieving nanoscale optical components that could support the growing infrastructure for the Internet of Things (IoT) and future sensing technologies. Consisting of quasiperiodic arrays of subwavelength scattering elements, metasurfaces apply spatial transfer functions to incident wavefronts, abruptly altering properties of light over a wavelength-scale thickness. By appropriately patterning scatterers on the structure, arbitrary functions can be implemented up to the limitations on the scattering properties of the particular elements. This thesis details theoretical work and simulations on the design of scattering elements with advanced capabilities for dielectric metasurfaces, showing polarization-multiplexed operation in the visible regime, multiwavelength capability in the visible regime along with a general methodology for eliminating chromatic aberrations at discrete wavelengths, and compact and tunable elements for 1550 nm operation inspired by an asymmetric Fabry-Perot cavity. These advancements enhance the capabilities of metasurfaces in the visible regime and help move toward the goal of achieving reconfigurable metasurfaces for compact and efficient optical sensors.
Advisors/Committee Members: Majumdar, Arka (advisor).
Subjects/Keywords: Achromatic metasurface; Metasurface; Polarization control; Tunable metasurface; Electrical engineering; Optics; Electrical engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Colburn, S. (2017). Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/40037
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):
Colburn, Shane. “Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing.” 2017. Thesis, University of Washington. Accessed April 13, 2021.
http://hdl.handle.net/1773/40037.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Colburn, Shane. “Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing.” 2017. Web. 13 Apr 2021.
Vancouver:
Colburn S. Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing. [Internet] [Thesis]. University of Washington; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1773/40037.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Colburn S. Dielectric Metasurface Optics: A New Platform for Compact Optical Sensing. [Thesis]. University of Washington; 2017. Available from: http://hdl.handle.net/1773/40037
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Exeter
4.
Shi, C.
Metasurface based mid-infrared devices.
Degree: PhD, 2019, University of Exeter
URL: http://hdl.handle.net/10871/39300
► The development of compact, efficient, and powerful mid-infrared devices is mainly restrained by the limited choice of materials due to the high loss of conventional…
(more)
▼ The development of compact, efficient, and powerful mid-infrared devices is mainly restrained by the limited choice of materials due to the high loss of conventional optical materials in the mid-infrared range. The aim of this work was to find alternative novel materials which would enable the realization of devices with smaller size while maintaining its functionality. Metasurface and graphene have emerged as promising materials which can help us to manipulate the infrared light within nano-meter scale thickness. In this thesis, three different mid-infrared devices, thermal emitter, wave trapping sensor and phase modulator were designed based on either metasurface or both metasurface and graphene. Devices were all fabricated with modern semiconductor fabrication processes and their performances were also fully investigated, both experimentally and through simulations. A metasurface was first designed as a frequency selective layer on a graphene thermal emitter to tailor the graybody emission spectrum from a graphene filament into two discrete narrow bands for applications such as gas sensing or molecule detection. The emission and reflectance spectra of the devices were characterised using (FTIR) Fourier transform infrared spectroscopy and showed good agreement with simulations based on the Finite-difference time-domain (FDTD). method. The use of a metasurface to enhance the interaction between molecular vibrations and the evanescent waves, in a total attenuated reflectance system, was also explored. A complementary ring-resonator structure was patterned onto both silicon and SiO2/Si substrates, and the spectral properties of both devices were characterised using an FTIR-ATR system. Experiments were undertaken using 5µL mixtures containing trace amounts of butyl acetate diluted with oleic acid. Without the use of a metasurface, the minimum concentration of butyl acetate that could be clearly detected was 10%, whereas the use of the metasurface on the SiO2/Si substrate allowed the detection of 1% butyl acetate. Finally, graphene was integrated into a metasurface structure to achieve tunability of the design. The third device investigated was a phase modulator which shows the capability to change the amplitude and phase of the reflected wave by electrostatically gating the graphene from -90V to 90V. A dynamic beam steering lens model which is made up of a unit cell consisting of four phase modulator with different phase shift was also proposed to control the angle for the reflected wave from specular to 30°.
Subjects/Keywords: Metasurface; Graphene; Mid-infrared
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shi, C. (2019). Metasurface based mid-infrared devices. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10871/39300
Chicago Manual of Style (16th Edition):
Shi, C. “Metasurface based mid-infrared devices.” 2019. Doctoral Dissertation, University of Exeter. Accessed April 13, 2021.
http://hdl.handle.net/10871/39300.
MLA Handbook (7th Edition):
Shi, C. “Metasurface based mid-infrared devices.” 2019. Web. 13 Apr 2021.
Vancouver:
Shi C. Metasurface based mid-infrared devices. [Internet] [Doctoral dissertation]. University of Exeter; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10871/39300.
Council of Science Editors:
Shi C. Metasurface based mid-infrared devices. [Doctoral Dissertation]. University of Exeter; 2019. Available from: http://hdl.handle.net/10871/39300

Vanderbilt University
5.
-5810-2347.
Multilayer Flat Optics.
Degree: PhD, Interdisciplinary Materials Science, 2020, Vanderbilt University
URL: http://hdl.handle.net/1803/15962
► Optical metasurfaces have emerged as an attractive platform for manipulating the wavefront of light based on thin film flat optics. Despite their design degrees of…
(more)
▼ Optical metasurfaces have emerged as an attractive platform for manipulating the wavefront of light based on thin film flat optics. Despite their design degrees of freedom, the functionalities that can be encoded on a single
metasurface are still limited. Here, I present my efforts to expand the functionality of metasurfaces by developing multilayer flat optics. I first explore the multilayer platform for independent phase modulation at multiple wavelengths, enabling the realization of multiwavelength metalenses and spectral splitters. I will demonstrate how expanding the platform can be used to independently control multiple optical properties, enabling various types of multifunctional metaoptics. Finally, I will demonstrate compound image processing systems that can perform the optical analogue of the Laplace operation. This system has applications in biological imaging and computer vision due to the fast computing speed and low power consumption.
Advisors/Committee Members: Valentine, Jason Gage (advisor).
Subjects/Keywords: Optics; Metasurface; Flat optics; Multilayer
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❌
APA ·
Chicago ·
MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
-5810-2347. (2020). Multilayer Flat Optics. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/15962
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-5810-2347. “Multilayer Flat Optics.” 2020. Doctoral Dissertation, Vanderbilt University. Accessed April 13, 2021.
http://hdl.handle.net/1803/15962.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-5810-2347. “Multilayer Flat Optics.” 2020. Web. 13 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-5810-2347. Multilayer Flat Optics. [Internet] [Doctoral dissertation]. Vanderbilt University; 2020. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1803/15962.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-5810-2347. Multilayer Flat Optics. [Doctoral Dissertation]. Vanderbilt University; 2020. Available from: http://hdl.handle.net/1803/15962
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Texas – Austin
6.
Liu, Yingnan, Ph. D.
Second-order nonlinear intersubband polaritonic metasurfaces.
Degree: PhD, Electrical and Computer Engineering, 2020, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/8127
► Frequency mixing is an essential nonlinear process with extensive applications in photonics, chemistry, biology, and energy sciences. Traditional nonlinear crystals have weak nonlinear responses and…
(more)
▼ Frequency mixing is an essential nonlinear process with extensive applications in photonics, chemistry, biology, and energy sciences. Traditional nonlinear crystals have weak nonlinear responses and light beams need long propagation distances in the crystals to accumulate a significant wave mixing in practice. However, wave mixing in such bulky crystals results in stringent phase-matching requirements and bulk nonlinear crystals are not compatible with modern “flat” optics concept that enables complete control of the phase-front of the output beam but requires optical medium with subwavelength thickness. Fortunately, the emerging of metasurfaces has provided an efficient method to generate the large nonlinear response on nanoscale. The metasurfaces have enabled the development of “flat” optical elements with the intrinsic benefit of small thickness, intricate control of the optical wavefront, and, in case of nonlinear optical elements, relaxed phase-matching constraints.
In my Ph.D. dissertation, I focus on the second-order intersubband polaritonic nonlinear metasurfaces. These structures combine enormous intersubband nonlinear response in III-V semiconductor heterostructures and field enhancement of plasmonic nano-resonators. Our earlier research has demonstrated giant nonlinear responses for the second harmonic generation in metasurfaces. In this dissertation, I propose several approaches to improve the performance of second harmonic generation metasurfaces and extend their functionality to difference-frequency and sum-frequency generation in the mid-infrared range. For the first part of this study, I have demonstrated new multiquantum-well designs for second harmonic generation with materials have much narrower linewidth compared with previous materials. This leads to a conversion efficiency of 1.2%. Second, I have demonstrated the mid-infrared difference-frequency generation in polaritonic nonlinear
metasurface for the first time. The optimization of the
metasurface, the theoretical investigation of the saturation effect, the fabrication of the
metasurface, and the experimental characterization of the
metasurface have been discussed. The effective nonlinear susceptibility is 340 nm/V and the differencefrequency generation conversion efficiency of this
metasurface is 0.13%. I have also demonstrated the mid-infrared sum-frequency generation in a polaritonic nonlinear
metasurface. Both the theoretical analysis of the saturation effect and the experimental characterization of the
metasurface have been illustrated. The upconversion efficiency of this
metasurface is 0.03% and the nonlinear susceptibility is 158 nm/V. In addition, as the prospect of the SFG metasurfaces, the performance of metasurfaces under extremely high
pump intensity has been discussed and the
metasurface designs for high conversion efficiency have been proposed. For the last part of this study, metasurfaces in the THz range have been explored. These metasurfaces are designed to generate 4~6 THz with a difference-frequency generation process…
Advisors/Committee Members: Belkin, Mikhail A. (advisor).
Subjects/Keywords: Metasurface; Frequency mixing; Nonlinear optics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, Yingnan, P. D. (2020). Second-order nonlinear intersubband polaritonic metasurfaces. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/8127
Chicago Manual of Style (16th Edition):
Liu, Yingnan, Ph D. “Second-order nonlinear intersubband polaritonic metasurfaces.” 2020. Doctoral Dissertation, University of Texas – Austin. Accessed April 13, 2021.
http://dx.doi.org/10.26153/tsw/8127.
MLA Handbook (7th Edition):
Liu, Yingnan, Ph D. “Second-order nonlinear intersubband polaritonic metasurfaces.” 2020. Web. 13 Apr 2021.
Vancouver:
Liu, Yingnan PD. Second-order nonlinear intersubband polaritonic metasurfaces. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2020. [cited 2021 Apr 13].
Available from: http://dx.doi.org/10.26153/tsw/8127.
Council of Science Editors:
Liu, Yingnan PD. Second-order nonlinear intersubband polaritonic metasurfaces. [Doctoral Dissertation]. University of Texas – Austin; 2020. Available from: http://dx.doi.org/10.26153/tsw/8127

King Abdullah University of Science and Technology
7.
Lin, Ronghui.
Design and topological optimization of nanophotonic devices.
Degree: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, 2020, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/665997
► A central topic in the research of nanophotonics is the geometrical optimization of the nanostructures since the geometries are deeply related to the Mie resonances…
(more)
▼ A central topic in the research of nanophotonics is the geometrical optimization of the nanostructures since the geometries are deeply related to the Mie resonances and the localized surface plasmon resonances in dielectric and metallic nanomaterials. When many nanostructures are assembled to form a metamaterial, the tuning of the geometrical parameters can bring even more profound effects, such as bound states in the continuum (BIC) with infinite quality factors (Q factors). Moreover, with the development of nanofabrication technologies, there is a trend of integrating nanostructures in the vertical direction, which provides more degrees of freedom for controlling the device performance and functionality. The main topic of this dissertation is to explore some of the abovementioned tuning possibilities to enhance the performance of nanophotonic devices. The dissertation contains two major parts:
In chapters 2 and 3, the vertical integration of metalenses is studied. We discover a phenomenon similar to the Moiré effect in the bilayer Pancharatnam-Berry phase metalenses and reveal the role of geometrical imperfections on the focusing performance of reflective metalenses. Novel multifocal and reflective metalenses, with smaller
footprints and enhanced performance compared to their bulky conventional counterparts, are designed based on the theoretical findings. The study of geometrical imperfections also provides guidelines for analyzing and compensating the fabrication errors, which is vital for large scale production and commercialization of metalenses.
In chapters 4 and 5, we use machine learning to harness the full tuning power of the complicated geometries, which is challenging with conventional design methods. Plasmonic metasurfaces with on-demand optical responses are designed by manipulating the coupling of multiple nanodisks using neural networks. An accuracy of ± 8 nm is achieved, which is higher than previous reports and close to the fabrication limits of nanofabrication technologies. We also demonstrate, for the first time, the control of multiple BIC states using freeform geometries with predefined symmetry. It is a new method to exploit the untapped potential of freeform photonics structures.
The discoveries we have made in both dielectric and plasmonic nanophotonic devices could benefit applications such as imaging, sensing, and light-emitting devices.
Advisors/Committee Members: Li, Xiaohang (advisor), Li, Xiaohang (committee member), Fratalocchi, Andrea (committee member), Liberale, Carlo (committee member), Lu, Tien-Chang (committee member).
Subjects/Keywords: nanophotonics; optimization methods; metalens; metasurface
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lin, R. (2020). Design and topological optimization of nanophotonic devices. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/665997
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):
Lin, Ronghui. “Design and topological optimization of nanophotonic devices.” 2020. Thesis, King Abdullah University of Science and Technology. Accessed April 13, 2021.
http://hdl.handle.net/10754/665997.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lin, Ronghui. “Design and topological optimization of nanophotonic devices.” 2020. Web. 13 Apr 2021.
Vancouver:
Lin R. Design and topological optimization of nanophotonic devices. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2020. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10754/665997.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lin R. Design and topological optimization of nanophotonic devices. [Thesis]. King Abdullah University of Science and Technology; 2020. Available from: http://hdl.handle.net/10754/665997
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona
8.
Ozdemir, Aytekin.
High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
.
Degree: 2018, University of Arizona
URL: http://hdl.handle.net/10150/626664
► Metasurfaces which emerged as two-dimensional counterparts of metamaterials, facilitate the realization of arbitrary phase distributions using large arrays with subwavelength and ultra-thin features. Even if…
(more)
▼ Metasurfaces which emerged as two-dimensional counterparts of metamaterials, facilitate the realization of arbitrary phase distributions using large arrays with subwavelength and ultra-thin features. Even if metasurfaces are ultra-thin, they still effectively manipulate the phase, amplitude, and polarization of light in transmission or reflection mode. In contrast, conventional optical components are bulky, and they lose their functionality at sub-wavelength scales, which requires conceptually new types of nanoscale optical devices. On the other hand, as the optical systems shrink in size day by day, conventional bulky optical components will have tighter alignment and fabrication tolerances. Since metasurfaces can be fabricated lithographically, alignment can be done during lithographic fabrication, thus eliminating the need for post-fabrication alignments. In this work, various types of
metasurface applications are thoroughly investigated for robust wavefront engineering with enhanced characteristics in terms of broad bandwidth, high efficiency and active tunability, while beneficial for application. Plasmonic metasurfaces are not compatible with the CMOS process flow, and, additionally their high absorption and ohmic loss is problematic in transmission based applications. Dielectric metasurfaces, however, offer a strong magnetic response at optical frequencies, and thus they can offer great opportunities for interacting not only with the electric component of a light field, but also with its magnetic component. They show great potential to enable practical device functionalities at optical frequencies, which motivates us to explore them one step further on wavefront engineering and imaging sensor platforms. Therefore, we proposed an efficient ultra-thin flat metalens at near-infrared regime constituted by silicon nanodisks which can support both electric and magnetic dipolar Mie-type resonances. These two dipole resonances can be overlapped at the same frequency by varying the geometric parameters of silicon nanodisks. Having two resonance mechanisms at the same frequency allows us to achieve full (0-2π) phase shift on the transmitted beam. To enable the miniaturization of pixel size for achieving high-resolution, planar, compact-size focal plane arrays (FPAs), we also present and explore the
metasurface lens array-based FPAs. The investigated dielectric
metasurface lens arrays achieved high focusing efficiency with superior optical crosstalk performance. We see a magnificent application prospect for metasurfaces in enhancing the fill factor and reducing the pixel size of FPAs and CCD, CMOS imaging sensors as well. Moreover, it is of paramount importance to design metasurfaces possessing tunable properties. Thus, we also propose a tunable beam steering device by combining phase manipulating metasurfaces concept and liquid crystals. Tunability feature is implemented by nematic liquid crystals infiltrated into nano holes in SiO2. Using electrically tunable nematic liquid crystals, dynamic beam steering is achieved
Advisors/Committee Members: Takashima, Yuzuru (advisor), Takashima, Yuzuru (committeemember), Kurt, Hamza (committeemember), Schwiegerling, James (committeemember).
Subjects/Keywords: all-dielectric metasurface;
cmos;
metalenses;
metasurface lens array;
metasurfaces
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Ozdemir, A. (2018). High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/626664
Chicago Manual of Style (16th Edition):
Ozdemir, Aytekin. “High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
.” 2018. Doctoral Dissertation, University of Arizona. Accessed April 13, 2021.
http://hdl.handle.net/10150/626664.
MLA Handbook (7th Edition):
Ozdemir, Aytekin. “High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
.” 2018. Web. 13 Apr 2021.
Vancouver:
Ozdemir A. High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
. [Internet] [Doctoral dissertation]. University of Arizona; 2018. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10150/626664.
Council of Science Editors:
Ozdemir A. High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces
. [Doctoral Dissertation]. University of Arizona; 2018. Available from: http://hdl.handle.net/10150/626664

University of California – San Diego
9.
Kim, Sung Woon.
Engineering of highly efficient metasurfaces for flat optics.
Degree: Materials Sci and Engineering, 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/888105k5
► Conventional optical components, such as lenses, mirrors, waveplates and polarizers, have been widely developed and used in many electronic and optical devices. Because these components…
(more)
▼ Conventional optical components, such as lenses, mirrors, waveplates and polarizers, have been widely developed and used in many electronic and optical devices. Because these components are bulky, they are not suitable for miniaturization and integration. In recent years, metasurfaces have emerged as a platform to realize the transformation of the field of optical devices as they have the potential to revolutionize the way light is controlled on a chip.Metallic nanostructures are intrinsically lossy in the optical spectral region due to the absorption in metals. In addition, the design parameters of metasurfaces have limitations for controlling the optical phase-front in the full range of 0 to 2π. These restrictions lead to the introduction of several undesirable losses, including reflection, diffraction, and polarization conversion. Compared to metallic nanostructures, dielectric metasurfaces have several significant advantages such as high transmission efficiency because they do not suffer from the intrinsic nonradiative losses in metals. All-dielectric metasurfaces can allow a diverse range of practical efficient wave-shaping applications of novel materials. In this dissertation, we report on the experimental study of the anomalous transmission effect in ultrathin metallic gratings, where the metal thickness is much thinner than the skin depth. In particular, incident TM polarized waves are reflected while incident TE polarized waves are transmitted. The anomalous transmission strongly depends on the metal width, thickness and refractive indices of the surrounding dielectric material. We systematically investigate and demonstrate the anomalous effect and determine the optimized nanostrip thickness and width by introducing a shadow-mask fabrication approach. The combined effect of thickness and width is experimentally investigated, and shown to match well with theoretical analysis. The main advantage of our ultrathin metal gratings lies in insertion loss reduction by utilizing the ultrathin metallic film fabrication. This advantage makes our structure readily suitable for a variety of applications including high efficiency metasurfaces, polarization steering, and polarization dependent spectral filter applications.Also, we explore the design, fabrication, and characterization of dielectric metasurface lens created by varying the density of subwavelength low refractive index nanoholes in a high refractive index substrate, resulting in a locally variable effective refraction index. It is demonstrated that constructed graded index lenses can overcome diffraction effects when the aperture to wavelength ratio (D/λ) is smaller than 40. Our design parameters for engineering the effective refractive index of a composite dielectric are created by controlling the density of deeply subwavelength low index nanoholes in a high index dielectric layer (e.g., Si). The phase of the optical wavefront incident on such a composite dielectric is modulated by the local effective index of the layer. We have demonstrated that the…
Subjects/Keywords: Optics; Dielectric metasurface lens; Ultrathin metallic grating
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kim, S. W. (2016). Engineering of highly efficient metasurfaces for flat optics. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/888105k5
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):
Kim, Sung Woon. “Engineering of highly efficient metasurfaces for flat optics.” 2016. Thesis, University of California – San Diego. Accessed April 13, 2021.
http://www.escholarship.org/uc/item/888105k5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kim, Sung Woon. “Engineering of highly efficient metasurfaces for flat optics.” 2016. Web. 13 Apr 2021.
Vancouver:
Kim SW. Engineering of highly efficient metasurfaces for flat optics. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2021 Apr 13].
Available from: http://www.escholarship.org/uc/item/888105k5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kim SW. Engineering of highly efficient metasurfaces for flat optics. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/888105k5
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto
10.
Wong, Joseph Pek Siang.
Design of Huygens' Metasurfaces for Refraction and Focusing.
Degree: 2015, University of Toronto
URL: http://hdl.handle.net/1807/69180
► The systematic design of unit cells for Huygens' metasurfaces is presented here. The Huygens' metasurface implements collocated electromagnetic boundary conditions enforcing the electric and magnetic…
(more)
▼ The systematic design of unit cells for Huygens' metasurfaces is presented here. The Huygens' metasurface implements collocated electromagnetic boundary conditions enforcing the electric and magnetic surface currents of the equivalence principle. This provides the flexibility necessary for efficient interfacial beamforming applications. Furthermore, the boundary condition nature permits achieving this in an electromagnetically thin profile. This concept and its design procedure are verified through application to refraction and Gaussian-beam to Gaussian-beam focusing. The Huygens' metasurfaces presented herein are printed on two bonded boards instead of many stacked, interspaced layers, and can be manufactured using standard PCB fabrication techniques. This simplifies the fabrication, and allows the design to be scaled to higher frequencies. These two bonded boards implement a single, collocated, sub-wavelength array of electric and magnetic dipoles. Furthermore, in contrast to traditional frequency-selective surfaces and transmitarrays, which are on the order of a wavelength thick, these designs are only a tenth of a wavelength thick.
M.A.S.
Advisors/Committee Members: Eleftheriades, George V, Electrical and Computer Engineering.
Subjects/Keywords: Huygens' source; Metasurface; Transmission line; transmitarray; 0607
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wong, J. P. S. (2015). Design of Huygens' Metasurfaces for Refraction and Focusing. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/69180
Chicago Manual of Style (16th Edition):
Wong, Joseph Pek Siang. “Design of Huygens' Metasurfaces for Refraction and Focusing.” 2015. Masters Thesis, University of Toronto. Accessed April 13, 2021.
http://hdl.handle.net/1807/69180.
MLA Handbook (7th Edition):
Wong, Joseph Pek Siang. “Design of Huygens' Metasurfaces for Refraction and Focusing.” 2015. Web. 13 Apr 2021.
Vancouver:
Wong JPS. Design of Huygens' Metasurfaces for Refraction and Focusing. [Internet] [Masters thesis]. University of Toronto; 2015. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1807/69180.
Council of Science Editors:
Wong JPS. Design of Huygens' Metasurfaces for Refraction and Focusing. [Masters Thesis]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/69180

University of Toronto
11.
Christian, Philip.
Retroreflective Binary Huygens' Metasurface.
Degree: 2018, University of Toronto
URL: http://hdl.handle.net/1807/95626
► This thesis discusses the ability to aggressively discretize a periodic surface to retroreflect an incident wave. The novelty of this work is related to the…
(more)
▼ This thesis discusses the ability to aggressively discretize a periodic surface to retroreflect an incident wave. The novelty of this work is related to the number of cells that are needed per grating period to obtain perfect retroreflective power efficiency. For an incident angle greater than 19.5 degrees from normal, perfect retroreflection is possible when considering a passive system having only two cells per grating period. This thesis reports the design and demonstration of near-grazing angle retroreflection metasurfaces for both TE and TM polarizations. Such aggressive discretization lessens, as much as possible, the need for small feature sizes, and results in a simple metasurface retroreflector that is extremely power efficient, cost-efficient and scalable to mm-wave and THz frequencies. Because of its simplicity, this approach can be used to realize electrically large retroreflectors that are very challenging for the standard Van Atta approach which requires complex wire routing.
M.A.S.
2019-07-10 00:00:00
Advisors/Committee Members: Eleftheriades, George V, Electrical and Computer Engineering.
Subjects/Keywords: Diffraction; Electromagnetics; Huygens; Metasurface; Reflection; Retroreflection; 0607
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Christian, P. (2018). Retroreflective Binary Huygens' Metasurface. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/95626
Chicago Manual of Style (16th Edition):
Christian, Philip. “Retroreflective Binary Huygens' Metasurface.” 2018. Masters Thesis, University of Toronto. Accessed April 13, 2021.
http://hdl.handle.net/1807/95626.
MLA Handbook (7th Edition):
Christian, Philip. “Retroreflective Binary Huygens' Metasurface.” 2018. Web. 13 Apr 2021.
Vancouver:
Christian P. Retroreflective Binary Huygens' Metasurface. [Internet] [Masters thesis]. University of Toronto; 2018. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1807/95626.
Council of Science Editors:
Christian P. Retroreflective Binary Huygens' Metasurface. [Masters Thesis]. University of Toronto; 2018. Available from: http://hdl.handle.net/1807/95626

University of Exeter
12.
Tremain, Benjamin James.
The microwave response of metasurfaces.
Degree: PhD, 2016, University of Exeter
URL: http://hdl.handle.net/10871/24304
► The aim of this thesis is to investigate surface waves supported on a variety of metallic metasurfaces at microwave frequencies. The goal is to characterise…
(more)
▼ The aim of this thesis is to investigate surface waves supported on a variety of metallic metasurfaces at microwave frequencies. The goal is to characterise the propagation of these surface waves in the plane of the structure and in some cases study how their presence gives rise to features in the scattering parameters of radiation incident on the metasurface.
Subjects/Keywords: 537; Metasurface; electromagnetism; metamaterials; surface waves
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tremain, B. J. (2016). The microwave response of metasurfaces. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10871/24304
Chicago Manual of Style (16th Edition):
Tremain, Benjamin James. “The microwave response of metasurfaces.” 2016. Doctoral Dissertation, University of Exeter. Accessed April 13, 2021.
http://hdl.handle.net/10871/24304.
MLA Handbook (7th Edition):
Tremain, Benjamin James. “The microwave response of metasurfaces.” 2016. Web. 13 Apr 2021.
Vancouver:
Tremain BJ. The microwave response of metasurfaces. [Internet] [Doctoral dissertation]. University of Exeter; 2016. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10871/24304.
Council of Science Editors:
Tremain BJ. The microwave response of metasurfaces. [Doctoral Dissertation]. University of Exeter; 2016. Available from: http://hdl.handle.net/10871/24304

University of Toronto
13.
Liang, Liang.
Design of Ultra-wideband Reflectors.
Degree: PhD, 2016, University of Toronto
URL: http://hdl.handle.net/1807/73046
► It is well-known that reflectarrays typically have a narrow bandwidth which is commonly attributed to the resonant nature of the antenna elements used and the…
(more)
▼ It is well-known that reflectarrays typically have a narrow bandwidth which is commonly attributed to the resonant nature of the antenna elements used and the narrow bandwidth of the phase shifting networks used. Typical approaches to increase the bandwidth include the use of true-time-delay (TTD) devices, coupling multiple resonances together, stacking multiple layer of scatterers or the use of numerical optimization techniques. While these approaches have been shown to improve the bandwidth of reflectarrays, the upper bound remains at approximately 40 in fractional bandwidth. This thesis investigates how ultra-wideband reflectors can be designed using novel approaches going beyond the conventional approaches listed above. Specifically, we investigate two new methods to design reflectarrays. In the first method, the reflector is designed as a Transformation Optics (TO) device and in the second method, the reflector is designed as a
metasurface. The TO method amounts to manipulating of electromagnetic waves using an appropriate set of material parameters such that the wave propagation inside the material behaves in a desired manner. We use TO as a means to design an ultra-wideband reflector and draw insights into the practical considerations associated with designing such a reflector. In the second method, we design a reflectarray as a
metasurface. Traditionally, reflectarrays are considered to be an array of individual antenna elements with no surface properties typically defined. A
metasurface often has homogenized surface properties such as surface impedance and admittance which are realized by sub-wavelength elements that make up the reflector. A novel method to design ultra-wideband reflector using a
metasurface is derived from first principles and it is shown that the designed reflector exhibits excellent characteristics over a very wide band of frequencies. The advantages and disadvantages of the reflectors designed using each of these two methods are discussed. A comparison of our
metasurface is made to a state-of-the-art wideband reflectarray.
Advisors/Committee Members: Hum, Sean V, Electrical and Computer Engineering.
Subjects/Keywords: antenna array; metasurface; reflectarray; wideband reflector; 0544
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liang, L. (2016). Design of Ultra-wideband Reflectors. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/73046
Chicago Manual of Style (16th Edition):
Liang, Liang. “Design of Ultra-wideband Reflectors.” 2016. Doctoral Dissertation, University of Toronto. Accessed April 13, 2021.
http://hdl.handle.net/1807/73046.
MLA Handbook (7th Edition):
Liang, Liang. “Design of Ultra-wideband Reflectors.” 2016. Web. 13 Apr 2021.
Vancouver:
Liang L. Design of Ultra-wideband Reflectors. [Internet] [Doctoral dissertation]. University of Toronto; 2016. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1807/73046.
Council of Science Editors:
Liang L. Design of Ultra-wideband Reflectors. [Doctoral Dissertation]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/73046

University of California – San Diego
14.
Brown, Eric Raymer.
Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers.
Degree: NanoEngineering, 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/592887dq
► Colloidal metasurfaces are two-dimensional arrays of subwavelength resonators generally composed of a precious metal substrate and a deposited layer of colloidal metal nanoparticles, ultimately yielding…
(more)
▼ Colloidal metasurfaces are two-dimensional arrays of subwavelength resonators generally composed of a precious metal substrate and a deposited layer of colloidal metal nanoparticles, ultimately yielding a functional nanomaterial surface with a total thickness on the order of 100 nanometers. Colloidal metasurfaces, as like other metasurfaces, possess the ability to control and manipulate light in ways thatcannot be done using natural materials, yet have the added benefit of much faster, cheaper, and larger scale construction. The precise construction parameters of these colloidal metasurfaces allow for the tuning of an extreme, in-plane electromagnetic coupling phenomenon that is primarily localized within the metasurface “gap.” Placing active materials (such as nanocrystals, fluorophores, and others) into this gap can lead to a variety of interesting effects that are potentially useful for the construction of larger functional devices. Certain types of active materials have very poor absorption capabilities, making them very difficult and/or inefficient to use as sensing agents and light collectors. Here we show that these colloidal metasurface gaps can be use to enhance the single- and multi-photon absorption efficiencies and subsequent emission intensities of an active layer of semiconducting nanocrystals via the integration of these nanocrystals into the metasurface gap during the metasurface construction process. Colloidal metasurfaces used for active layer enhancement can subsequently be tuned to accommodate many different types of absorbing active layers.
Subjects/Keywords: Nanotechnology; Nanoscience; Materials Science; Colloidal Metasurface; Enhancement; Metasurface; Plasmon; Quantum Dot; Silver Nanocube
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brown, E. R. (2016). Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/592887dq
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):
Brown, Eric Raymer. “Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers.” 2016. Thesis, University of California – San Diego. Accessed April 13, 2021.
http://www.escholarship.org/uc/item/592887dq.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brown, Eric Raymer. “Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers.” 2016. Web. 13 Apr 2021.
Vancouver:
Brown ER. Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2021 Apr 13].
Available from: http://www.escholarship.org/uc/item/592887dq.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brown ER. Highly Uniform Colloidal Metasurfaces for the Photoluminescent Enhancement of Quantum Dot Active Layers. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/592887dq
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Irvine
15.
Veysi, Mehdi.
Electromagnetic Wavefront Manipulation with Metasurfaces.
Degree: Electrical and Computer Engineering, 2017, University of California – Irvine
URL: http://www.escholarship.org/uc/item/0cq6c0f7
► Conventional optical devices such as lenses with aberration correction, quarter-wave plate made of birefringent and chiral materials, spatial light modulators, and spiral phase-plates may meet…
(more)
▼ Conventional optical devices such as lenses with aberration correction, quarter-wave plate made of birefringent and chiral materials, spatial light modulators, and spiral phase-plates may meet the performance demand in both bandwidth and efficiency, but they are usually bulky, and difficult to integrate in nanophotonic systems. Nevertheless, the market constantly demands cheaper and thinner devices with better performance. In the last few years with the availability of nanoscale fabrication tools, plasmonic metasurfaces with subwavelength unit cells have attracted increasing attention in optics and photonics due to their capability to manipulate beams’ wavefront over a subwavelength distance. Metasurfaces can introduce vast flexibility in the design of optical devices by tailoring the polarization state and wavefront of the beams. The manipulation of the light beams can be realized with resonant elements, which provide phase change discontinuities as the light travels across the metasurface (i.e., structured surface). The possibility of creating abrupt phase changes at optical/infrared frequencies can eliminate the need for propagation path compensation in lensing, or reduce the physical dimensions required for a quarter-wave plate or a phase-plate, because the tailoring of the beam is achieved by resonant printed elements on a metasurface with an extremely subwavelength thickness. Probably even more importantly such abrupt phase changes recently enabled the generation of complex optical beams with orbital angular momentum a reality. Such beam characteristics are desired in many applications such as free space communications, remote sensing, multi-mode communication systems and secure communications. This dissertation focuses on flat thin metasurfaces for wavefront engineering. We demonstrate the exotic capability of the metasurface in local phase, amplitude and polarization control of the electromagnetic waves along the surface populated with resonant antennas. A new class of flat, compact, multifunctional components, so-called polarizing lens, is introduced in an attempt to merge two important optical components, a circular polarizer and a lens, into a thin plasmonic metasurface. The concept of polarizing lens is then further extended to the investigation and development of multi-focus lenses and lenses with extended depth of focus. Another exotic application of metasurfaces is transforming incident beams into complex beams such as vector beams with non-uniform local polarization distributions. In particular, we focus on realizing azimuthally polarized beams which contain a magnetic dominant region within which longitudinal magnetic field is strong and electric field is ideally null. Such beams are promising for studying weak magnetic transitions in optical frequency range. Lastly, the exotic properties of the orbital angular momentum carrying beams, such as annular-shaped intensity profile and helical wavefront, motivated us to generate such beams in radio frequencies. We demonstrate that reflectarrays are an…
Subjects/Keywords: Electromagnetics; Electrical engineering; Metasurface Lens; Metasurface Polarizers; Metasurfaces; Orbital Angular Momentum Beams; Reflectarrays
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Veysi, M. (2017). Electromagnetic Wavefront Manipulation with Metasurfaces. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/0cq6c0f7
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):
Veysi, Mehdi. “Electromagnetic Wavefront Manipulation with Metasurfaces.” 2017. Thesis, University of California – Irvine. Accessed April 13, 2021.
http://www.escholarship.org/uc/item/0cq6c0f7.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Veysi, Mehdi. “Electromagnetic Wavefront Manipulation with Metasurfaces.” 2017. Web. 13 Apr 2021.
Vancouver:
Veysi M. Electromagnetic Wavefront Manipulation with Metasurfaces. [Internet] [Thesis]. University of California – Irvine; 2017. [cited 2021 Apr 13].
Available from: http://www.escholarship.org/uc/item/0cq6c0f7.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Veysi M. Electromagnetic Wavefront Manipulation with Metasurfaces. [Thesis]. University of California – Irvine; 2017. Available from: http://www.escholarship.org/uc/item/0cq6c0f7
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Duke University
16.
Boyarsky, Michael.
Metasurface Antennas for Synthetic Aperture Radar
.
Degree: 2019, Duke University
URL: http://hdl.handle.net/10161/20124
► Synthetic aperture radar offers unparalleled satellite imaging capabilities for planetary observation. Future systems will realize high resolution with near-real-time revisit rates by using coordinated…
(more)
▼ Synthetic aperture radar offers unparalleled satellite imaging capabilities for planetary observation. Future systems will realize high resolution with near-real-time revisit rates by using coordinated satellites, but their development has been slowed by the high cost, high power draw, and substantial weight associated with existing antenna technology.
Metasurface antennas - a lightweight, low cost, and planar alternative - can address these challenges to make large scale, multi-satellite systems practical. In this work, an electronically steered
metasurface antenna prototype is developed for synthetic aperture imaging. A cohesive approach to modeling and design led to a Nyquist sampled layout which minimizes inter-element coupling and suppresses grating lobes. Experimental measurements validate its ability to steer a beam in 2D across a wide bandwidth. Robust performance and favorable hardware characteristics have poised
metasurface antennas to affect many microwave industries and to facilitate multi-satellite constellations for spaceborne synthetic aperture radar.
Advisors/Committee Members: Smith, David R (advisor).
Subjects/Keywords: Electrical engineering;
Antennas;
Metamaterials;
Metasurface antennas;
Microwave imaging;
Synthetic aperture radar
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Boyarsky, M. (2019). Metasurface Antennas for Synthetic Aperture Radar
. (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/20124
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):
Boyarsky, Michael. “Metasurface Antennas for Synthetic Aperture Radar
.” 2019. Thesis, Duke University. Accessed April 13, 2021.
http://hdl.handle.net/10161/20124.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Boyarsky, Michael. “Metasurface Antennas for Synthetic Aperture Radar
.” 2019. Web. 13 Apr 2021.
Vancouver:
Boyarsky M. Metasurface Antennas for Synthetic Aperture Radar
. [Internet] [Thesis]. Duke University; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10161/20124.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Boyarsky M. Metasurface Antennas for Synthetic Aperture Radar
. [Thesis]. Duke University; 2019. Available from: http://hdl.handle.net/10161/20124
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
17.
Sieber, Peter Erich.
Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces.
Degree: 2015, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/26631
► For more than a decade, metamaterials have generated significant interest due to their theoretical and later experimentally demonstrated properties that are not observed in nature;…
(more)
▼ For more than a decade, metamaterials have generated significant interest due to their theoretical and later experimentally demonstrated properties that are not observed in nature; yet, many of these designs are plagued by very limited bandwidth and/or high losses due to the dispersion characteristics of metamaterials. While many applications exist where a narrow band response is acceptable, examples of dual-band and multi-band responses within a communication bandwidth are limited. Furthermore, the ability to implement reconfigurability becomes complicated due to the lack of high performance switch technologies. In this dissertation, a new technique for constructing and synthesizing broadband metasurfaces is presented. A synthesis technique using Bézier surfaces is subsequently shown to not only outperform known optimization techniques but to produce results with bandwidths far exceeding those found in the literature. Additionally, a composite metamaterial geometry is introduced that facilitates a dual band response with a tunable frequency ratio within usable bands. The design also facilitates reconfigurablity. To mitigate the loss and bandwidth concerns of existing RF switch technologies a new technology is introduced and characterized - a chalcogenide glass phase change material enabled bistable switch. The superior efficiency and bandwidth are subsequently demonstrated by a novel quad state frequency selective surface, which once again boasts multiband reconfigurability within a communication band.
Advisors/Committee Members: Douglas Henry Werner, Dissertation Advisor/Co-Advisor, Theresa Stellwag Mayer, Committee Member, David Carl Swanson, Committee Member, Pingjuan Li Werner, Committee Member.
Subjects/Keywords: metamaterials; antenna; dual band; broad band; RF switch; waveplate; metasurface
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Sieber, P. E. (2015). Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/26631
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):
Sieber, Peter Erich. “Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces.” 2015. Thesis, Penn State University. Accessed April 13, 2021.
https://submit-etda.libraries.psu.edu/catalog/26631.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sieber, Peter Erich. “Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces.” 2015. Web. 13 Apr 2021.
Vancouver:
Sieber PE. Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Apr 13].
Available from: https://submit-etda.libraries.psu.edu/catalog/26631.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sieber PE. Low-loss Dispersion Engineered Wide-band, Multi-band, And Reconfigurable Anisotropic Metamaterials And Bézier Metasurfaces. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/26631
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rice University
18.
Zhang, Ming.
Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation.
Degree: MS, Natural Sciences, 2019, Rice University
URL: http://hdl.handle.net/1911/107749
► Vacuum ultraviolet (VUV) light, in the wavelength regime between 100nm and 200nm, is of long-lasting interest in both academia and industry for its strong photon…
(more)
▼ Vacuum ultraviolet (VUV) light, in the wavelength regime between 100nm
and 200nm, is of long-lasting interest in both academia and industry for its strong
photon energy and efficient absorption in most common materials. However, a
simple and robust way of VUV light generation remains to be found. In this thesis, I
report a titanium dioxide (TiO2) all-dielectric
metasurface that enables light
generation at 185nm through photonic resonance enhanced third-harmonic
generation (THG). Both theoretical analysis and experimental measurements of the
metasurface are presented in detail. A multi-step model to calculate generated THG
strength is demonstrated. In addition, I include a heat transfer model to analyze the
thermal effect of the high input laser power on THG power dependence. A nonlinear
signal enhancement factor of 180 compared to an unpatterned TiO2 thin film is
reported in the experiment. Finally, the possibility to further enhance the
conversion efficiency of the device by using a reflective structure and redesigning
the structure geometry through inverse design is also discussed in the simulation
aspect.
Advisors/Committee Members: Nordlander, Peter (advisor).
Subjects/Keywords: Titanium dioxide; Third-harmonic generation; Vacuum ultraviolet; Metasurface.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, M. (2019). Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/107749
Chicago Manual of Style (16th Edition):
Zhang, Ming. “Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation.” 2019. Masters Thesis, Rice University. Accessed April 13, 2021.
http://hdl.handle.net/1911/107749.
MLA Handbook (7th Edition):
Zhang, Ming. “Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation.” 2019. Web. 13 Apr 2021.
Vancouver:
Zhang M. Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation. [Internet] [Masters thesis]. Rice University; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1911/107749.
Council of Science Editors:
Zhang M. Titanium Dioxide Metasurface for Vacuum Ultraviolet Third-harmonic Generation. [Masters Thesis]. Rice University; 2019. Available from: http://hdl.handle.net/1911/107749

Duke University
19.
Li, Junfei.
Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
.
Degree: 2020, Duke University
URL: http://hdl.handle.net/10161/21044
► Metamaterials are artificially engineered materials or structures that exhibit exotic properties that are not found in nature. They have been serving as a primary…
(more)
▼ Metamaterials are artificially engineered materials or structures that exhibit exotic properties that are not found in nature. They have been serving as a primary approach to fully control the behavior of electromagnetic waves, acoustic waves and elastic waves in recent years, and is at present a highly active research area. Metasurfaces, as the 2D version of metamaterials, have opened up unprecedented possibilities for controlling waves at will, offering a solution of molding wave propagation within a thin sheet of structures. Most
metasurface designs are based on the so-called generalized Snell's Law (GSL) which achieves their functionalities by engineering the local phase shift in the unit cells. However, the efficiency of phase-gradient metasurfaces is fundamentally limited by the impedance mismatch and local porer flow mismatch between incident field and reflected/transmitted field, so that part of the energy is scattered into unwanted higher-order diffracted modes, which hinders the applicability in various scenarios. In this work, we approach these issues by exploiting acoustic bianisotropy (Willis coupling for acoustics) as an additional degree of freedom to control waves. We have explored highly efficient wavefront engineering in airborne acoustics, from manipulating simple plane waves and cylindrical harmonics to more complicated fields and finally, arbitrary wavefronts. Then we extended the application of bianisotropic metasurfaces to general impedance matching problems and demonstrated wavefront engineering in underwater acoustics with two examples: an aberration-layer penetration
metasurface and a 3D acoustic tweezer. This dissertation provides a summary of the work undertaken to achieve highly efficient and functional wavefront engineering devices, and briefly outlines some objectives for future work. Firstly, we designed an acoustic bianisotropic unit cell with full control over its scattering properties and demonstrated bianisotropic metasurfaces that overcome the fundamental limits of phase-gradient based metasurfaces. Second, we mapped the approach from Cartesian coordinates into cylindrical coordinates and demonstrated the generation of a pure field with high angular momentum. Third, we introduced surface waves to help power redistribution along the
metasurface and achieved highly-efficient beam splitting and reflection. Forth, we further introduced the power-flow conformal
metasurface to meet the power balance requirements for an arbitrary perfect wavefront transformation. Then we extended the application of bianisotropic metasurfaces and proposed a general impedance matching strategy, and demonstrated the idea with a case of aberration-layer penetration in water. Last but not least, by shaping the wavefront of underwater ultrasound, a 3D acoustic tweezer is demonstrated for manipulating a wide range of particles in a contact-less manner.
Advisors/Committee Members: Cummer, Steven A (advisor).
Subjects/Keywords: Engineering;
Acoustics;
Electromagnetics;
Bianisotropic;
Highly-efficient;
Metasurface;
Tweezer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, J. (2020). Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
. (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/21044
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):
Li, Junfei. “Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
.” 2020. Thesis, Duke University. Accessed April 13, 2021.
http://hdl.handle.net/10161/21044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Junfei. “Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
.” 2020. Web. 13 Apr 2021.
Vancouver:
Li J. Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
. [Internet] [Thesis]. Duke University; 2020. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10161/21044.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li J. Highly Efficient Wavefront Transformation with Acoustic Metasurfaces
. [Thesis]. Duke University; 2020. Available from: http://hdl.handle.net/10161/21044
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Australian National University
20.
Wang, Lei.
Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
.
Degree: 2018, Australian National University
URL: http://hdl.handle.net/1885/164707
► Metasurfaces offer unique opportunities for functional flat optics and allow controlling the transmission, reflection, and polarization of light. In particular, all-dielectric resonant metasurfaces have reached…
(more)
▼ Metasurfaces offer unique opportunities for functional flat
optics and allow controlling the transmission, reflection, and
polarization of light. In particular, all-dielectric resonant
metasurfaces have reached remarkable efficiencies and
performances. The meta-atoms based on generalized Huygens'
principle give flexible full-range phase modulation with nearly
no loss. Holographic calculations can carefully map out the
spatial arrangement of the meta-atoms and exploit the potential
of the metasurface platform for wavefront control. Such advanced
and complex wavefront engineering is fully studied and extended
to the nonlinear regime, where the nonlinear optical response of
metasurfaces opens up new degrees of freedom. This offers a
paradigm shift in nonlinear optics. The nonlinear metaholograms
are expected to revolutionize subwavelength photonics by
enhancing substantially the nonlinear response of natural
materials combined with an efficient control of the phase of
their nonlinear waves. It is believed that the joint effects of
advanced wavefront control in linear and nonlinear optics could
eventually lead to integrated photonic computing and
nanophotonics quantum circuits.
In this thesis, the development of the nonlinear holographic
metasurfaces is presented in a progressive order. In Chapter 1,
we provide a comprehensive introduction to the development of
metasurfaces, followed by the motivation of creating practical
nanophotonic devices. Chapter 2 explains the principles of
designing holographic Metasurfaces and phase modulating
meta-atoms. We demonstrate a complex wavefront control using the
highly efficient polarization-insensitive holographic Huygens'
metasurface based on resonant silicon meta-atoms. Moving forward,
we demonstrate the transparent meta-holograms based on silicon
metasurfaces that allow high-resolution grayscale images to be
encoded. The holograms feature the highest diffraction and
transmission efficiencies, and operate over a broad spectral
range. Chapter 3 explores various types of nonlinear
nano-antennas. The multipolar nature of nonlinear resonance is
firstly proved by experiment using a nonlinear setup. Our method
of optical diagnostics provides a fast and convenient way to
acquire the information on materials' nonlinear responses, and it
links the nonlinear behaviors of materials to their intrinsic
properties. Both numerically and experimentally, the
third-harmonic generation (THG) from silicon dimers composed of
pairs of two identical silicon nanoparticles demonstrates the
multipolar harmonic modes near the Mie resonances that allow
shaping of directionality of nonlinear radiation. Efficient
control of both electric and magnetic components of light leads
to the enhancement of nonlinear effects near electric and
magnetic Mie resonances with an engineered…
Subjects/Keywords: Metasurface;
Metamaterial;
Nonlinear Optics;
Wavefront Control;
Phase Control;
Hologram;
Silicon
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, L. (2018). Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
. (Thesis). Australian National University. Retrieved from http://hdl.handle.net/1885/164707
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):
Wang, Lei. “Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
.” 2018. Thesis, Australian National University. Accessed April 13, 2021.
http://hdl.handle.net/1885/164707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Lei. “Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
.” 2018. Web. 13 Apr 2021.
Vancouver:
Wang L. Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
. [Internet] [Thesis]. Australian National University; 2018. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1885/164707.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang L. Advanced Wavefront Control with Linear and Nonlinear Metasurfaces
. [Thesis]. Australian National University; 2018. Available from: http://hdl.handle.net/1885/164707
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Australian National University
21.
Komar, Andrei.
Tunable All-dielectric Metasurfaces: Fundamentals and Applications
.
Degree: 2018, Australian National University
URL: http://hdl.handle.net/1885/171649
► All-dielectric metasurfaces have received significant attention in the past years, and have been established as a platform for efficient manipulation of optical beams. Advances in…
(more)
▼ All-dielectric metasurfaces have received significant attention
in the past years, and have been established as a platform for
efficient manipulation of optical beams. Advances in the design
and fabrication of such dielectric metasurfaces have led to the
development of several ultra-thin optical metadevices, including
flat lenses, beam converters, deflectors and holograms. Composed
of periodic or aperiodic lattices of dielectric nanoparticles,
metasurfaces exhibit low absorption in the infrared and visible
spectral ranges. Low losses allow nanoparticles to exhibit
Mie-type resonances with a higher quality-factor in comparison to
their plasmonic counterparts. Furthermore, Mie-type resonances in
dielectric nanoparticles offer two independent families of
resonant modes - electric and magnetic. The far-field
interference of these two types of resonant modes leads to
fundamentally new effects, such as unidirectional scattering,
unconventional reflection behaviour associated with the
generalised Brewster effect and near-unity transmission in the
so-called Huygens' regime. Operating in the Huygens' regime of
the dielectric metasurfaces enables the combination of near-unity
transmission together with a full range of phase modulation, thus
being the key to enabling functional dielectric metasurfaces with
nearly 100% efficiency.
Most functional dielectric metasurfaces to date are based on
static designs, defined through geometrical parameters, such as
nanoparticle shape, size, and array layout. However, in many
applications, it is crucial to enable dynamic tunability of the
device functionality with time. For example, the focal distance
of a camera lens needs to be changed when taking pictures of
objects at different distances; the position of the ranging beam
in a LIDAR (light imaging, detection, and ranging) for driverless
vehicles needs to scan different directions. Therefore,
implementing dynamic control} over the response of the
metasurfaces is of paramount importance for their practical
implementation.
In this thesis, I discuss possible ways to achieve tunability
from dielectric metasurfaces. At first, I consider existing
methods, their pros and cons, as well as possible applications.
Further, I offer several methods that I developed and
investigated, both theoretically and experimentally. Namely, I
describe tuning by changing the properties of resonator material,
where I utilise a thermo-optic effect to control the refractive
index of resonator particles and consequently the optical
response of metasurfaces. Next, I consider tuning by changing the
properties of surrounding material, first theoretically, and
later demonstrating experimental realisation of this concept
using a liquid crystal as a tuning medium. Finally, I describe
two tunable metadevices: one, for switching a beam…
Subjects/Keywords: tunable metasurface;
Mie-type resonance;
liquid crystal;
beam deflection
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Komar, A. (2018). Tunable All-dielectric Metasurfaces: Fundamentals and Applications
. (Thesis). Australian National University. Retrieved from http://hdl.handle.net/1885/171649
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):
Komar, Andrei. “Tunable All-dielectric Metasurfaces: Fundamentals and Applications
.” 2018. Thesis, Australian National University. Accessed April 13, 2021.
http://hdl.handle.net/1885/171649.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Komar, Andrei. “Tunable All-dielectric Metasurfaces: Fundamentals and Applications
.” 2018. Web. 13 Apr 2021.
Vancouver:
Komar A. Tunable All-dielectric Metasurfaces: Fundamentals and Applications
. [Internet] [Thesis]. Australian National University; 2018. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1885/171649.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Komar A. Tunable All-dielectric Metasurfaces: Fundamentals and Applications
. [Thesis]. Australian National University; 2018. Available from: http://hdl.handle.net/1885/171649
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington
22.
Hong, Chuchuan.
Meta-form near eye visor.
Degree: 2017, University of Washington
URL: http://hdl.handle.net/1773/40054
► This thesis is about meta-form near-eye visor (NEV). Near eye visor is the core component in a head mounted display (HMD), because it directly decides…
(more)
▼ This thesis is about meta-form near-eye visor (NEV). Near eye visor is the core component in a head mounted display (HMD), because it directly decides the quality and volume of HMD. Regarding freeform NEV, a limitation on Field of View (FOV) is proposed. A flat shape phase mask visor, termed here as meta-form visor, is used to replace the freeform NEV to lift the limitation.
Metasurface is chosen to work as the visor, because of its flat surface and capability to implement spatial modulation to incident light wave.
Metasurface is a two-dimensional array of subwavelength scatterers. Meta-form visor’s vision performance is simulated in Zemax. Image simulation using the designed
metasurface is performed in Lumerical FDTD. In this design dielectric material is chosen to compose the
metasurface, for its lower loss in visible frequency than metallic
metasurface.
Advisors/Committee Members: Majumdar, Arka (advisor).
Subjects/Keywords: metasurface; near eye display; Electrical engineering; Electrical engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hong, C. (2017). Meta-form near eye visor. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/40054
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):
Hong, Chuchuan. “Meta-form near eye visor.” 2017. Thesis, University of Washington. Accessed April 13, 2021.
http://hdl.handle.net/1773/40054.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hong, Chuchuan. “Meta-form near eye visor.” 2017. Web. 13 Apr 2021.
Vancouver:
Hong C. Meta-form near eye visor. [Internet] [Thesis]. University of Washington; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1773/40054.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hong C. Meta-form near eye visor. [Thesis]. University of Washington; 2017. Available from: http://hdl.handle.net/1773/40054
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington
23.
Zhan, Alan.
Design and Optimization of Dielectric Metasurface Optics.
Degree: PhD, 2019, University of Washington
URL: http://hdl.handle.net/1773/44886
► In recent years, sub-wavelength, aperiodic gratings, currently coined metasurfaces have the potential to manipulate electromagnetic elds with extreme control in a remarkably small form factor.…
(more)
▼ In recent years, sub-wavelength, aperiodic gratings, currently coined metasurfaces have the potential to manipulate electromagnetic elds with extreme control in a remarkably small form factor. These planar optical components promise to manipulate incident elds at the wavelength scale to achieve unprecedented functionalities. This extraordinary exibility arises from the extremely large numbers of tunable degrees of freedom characterizing the individual discrete scatterers. This thesis details two methods for the design of these optical elements, a forward method, and an inverse method. First, a forward design method is described for metasurfaces based on a silicon nitride nanopost platform. Results from experiments characterizing
metasurface lenses, vortex beam generators, cubic phase plates, and Alvarez lenses are presented. These optical elements were all designed to operate in the visible frequencies, and fabricated using conventional top-down semiconductor lithography. Then, a general inverse design method is described for discrete spherical scatterer based optical elements. Simulation results for single layer and multilayer lenses for fabrication using a 3D printer are shown, and simulation and experimental results for a novel optical element producing a discrete helical focusing pattern is presented.
Advisors/Committee Members: Majumdar, Arka (advisor).
Subjects/Keywords: dielectric; metasurface; optics; optimization; silicon nitride; Optics; Physics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhan, A. (2019). Design and Optimization of Dielectric Metasurface Optics. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/44886
Chicago Manual of Style (16th Edition):
Zhan, Alan. “Design and Optimization of Dielectric Metasurface Optics.” 2019. Doctoral Dissertation, University of Washington. Accessed April 13, 2021.
http://hdl.handle.net/1773/44886.
MLA Handbook (7th Edition):
Zhan, Alan. “Design and Optimization of Dielectric Metasurface Optics.” 2019. Web. 13 Apr 2021.
Vancouver:
Zhan A. Design and Optimization of Dielectric Metasurface Optics. [Internet] [Doctoral dissertation]. University of Washington; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1773/44886.
Council of Science Editors:
Zhan A. Design and Optimization of Dielectric Metasurface Optics. [Doctoral Dissertation]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/44886

University of Washington
24.
Zhan, Alan.
Design and Optimization of Dielectric Metasurface Optics.
Degree: PhD, 2019, University of Washington
URL: http://hdl.handle.net/1773/44427
► In recent years, sub-wavelength, aperiodic gratings, currently coined metasurfaces have the potential to manipulate electromagnetic elds with extreme control in a remarkably small form factor.…
(more)
▼ In recent years, sub-wavelength, aperiodic gratings, currently coined metasurfaces have the potential to manipulate electromagnetic elds with extreme control in a remarkably small form factor. These planar optical components promise to manipulate incident elds at the wavelength scale to achieve unprecedented functionalities. This extraordinary exibility arises from the extremely large numbers of tunable degrees of freedom characterizing the individual discrete scatterers. This thesis details two methods for the design of these optical elements, a forward method, and an inverse method. First, a forward design method is described for metasurfaces based on a silicon nitride nanopost platform. Results from experiments characterizing
metasurface lenses, vortex beam generators, cubic phase plates, and Alvarez lenses are presented. These optical elements were all designed to operate in the visible frequencies, and fabricated using conventional top-down semiconductor lithography. Then, a general inverse design method is described for discrete spherical scatterer based optical elements. Simulation results for single layer and multilayer lenses for fabrication using a 3D printer are shown, and simulation and experimental results for a novel optical element producing a discrete helical focusing pattern is presented.
Advisors/Committee Members: Majumdar, Arka (advisor).
Subjects/Keywords: dielectric; metasurface; optics; optimization; silicon nitride; Optics; Physics
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhan, A. (2019). Design and Optimization of Dielectric Metasurface Optics. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/44427
Chicago Manual of Style (16th Edition):
Zhan, Alan. “Design and Optimization of Dielectric Metasurface Optics.” 2019. Doctoral Dissertation, University of Washington. Accessed April 13, 2021.
http://hdl.handle.net/1773/44427.
MLA Handbook (7th Edition):
Zhan, Alan. “Design and Optimization of Dielectric Metasurface Optics.” 2019. Web. 13 Apr 2021.
Vancouver:
Zhan A. Design and Optimization of Dielectric Metasurface Optics. [Internet] [Doctoral dissertation]. University of Washington; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1773/44427.
Council of Science Editors:
Zhan A. Design and Optimization of Dielectric Metasurface Optics. [Doctoral Dissertation]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/44427

Delft University of Technology
25.
Andrašec, Josip (author).
A metasurface-based miniaturized spectropolarimeter design.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:7acfb65e-97ef-4e8e-89ca-84b7749c2760
► This research is focused on the feasibility assessment of a novel technology of metasurfaces in order to design a spectropolarimeter with the thickness of a…
(more)
▼ This research is focused on the feasibility assessment of a novel technology of metasurfaces in order to design a spectropolarimeter with the thickness of a few micrometers integrated on the detector array. The motivation behind the research is miniaturization of state-of-the-art spectropolarimeters. The requirements for the instrument are derived from SPEXone instrument, as a reference instrument. Beside the miniaturization, two additional requirements are set as a goal: possibility to measure full-Stokes vector of polarization (including circular polarization), and to improve the spectropolarimetric resolution. The reduction in the volume of the instrument is not the main advantage, but also reduction in the number of optical components with respect to the state-of-the-art. A spectropolarimeter with fewer components allows better stability of performances over different external conditions like temperature change, and easier alignment of the whole system. In recent years the dielectric metasurfaces attract a lot of attention. Firstly, due to its compatibility to CMOS detector technology, which allows integration of thin layers of metasurfaces directly on the detector array, and secondly due to high transmission of the dielectric materials. The
metasurface is an array of scatterers with period and size of scatterers smaller than the wavelength. With proper design, the complete control of electromagnetic waves is possible, including amplitude, phase, and polarization at subwavelength resolution. This is convenient because diffraction is not present at that scale. That enables to design optical devices like lenses, waveplates, polarizing beam splitters with similar performances as current technology, but with extreme reduction in thickness. In this thesis, a systematic electromagnetic performance analysis of metasurfaces is presented. Two types of metasurfaces are designed, first acting as a waveplate, and second as a linear polarizer at different spectral wavelengths. Also, a trade-off of the most suitable spectropolarimetric techniques is done, which led to the Division of Focal Plane (DoFP) type of polarimeter. The combination of these two layers of metasurfaces can modulate the polarization state of light in form of the intensity of light, which is measured on detector pixels. It is shown that with this technique, four unique pixels, each with different polarization modulation, are required to reconstruct four unknowns, the Stokes vector, which fully describes the state of polarization of incident light. Furthermore, the spectral information is measured by designing different sets of four pixels to filter out different parts of the spectrum. The result is two-dimensional detector array which measures spectrum in the vertical axis, and spatial information in the horizontal axis. The spatial information in the vertical axis is achieved by implementing the push broom concept of a satellite. Moreover, the important spectropolarimetric parameters like spectropolarimetric accuracy, spectropolarimetric resolution,…
Advisors/Committee Members: Kuiper, Hans (mentor), Gerini, Giampiero (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: metasurface; spectropolarimeter; spectropolarimetry; waveplate; Fabry–Pérot filter; remote sensing
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APA (6th Edition):
Andrašec, J. (. (2019). A metasurface-based miniaturized spectropolarimeter design. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:7acfb65e-97ef-4e8e-89ca-84b7749c2760
Chicago Manual of Style (16th Edition):
Andrašec, Josip (author). “A metasurface-based miniaturized spectropolarimeter design.” 2019. Masters Thesis, Delft University of Technology. Accessed April 13, 2021.
http://resolver.tudelft.nl/uuid:7acfb65e-97ef-4e8e-89ca-84b7749c2760.
MLA Handbook (7th Edition):
Andrašec, Josip (author). “A metasurface-based miniaturized spectropolarimeter design.” 2019. Web. 13 Apr 2021.
Vancouver:
Andrašec J(. A metasurface-based miniaturized spectropolarimeter design. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 13].
Available from: http://resolver.tudelft.nl/uuid:7acfb65e-97ef-4e8e-89ca-84b7749c2760.
Council of Science Editors:
Andrašec J(. A metasurface-based miniaturized spectropolarimeter design. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:7acfb65e-97ef-4e8e-89ca-84b7749c2760
26.
Garner, Corey Isaac.
Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies.
Degree: M.S. in Engineering Science, Electrical Engineering, 2015, University of Mississippi
URL: https://egrove.olemiss.edu/etd/519
Subjects/Keywords: Cloaking; Metasurface; Electromagnetics and Photonics
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APA ·
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APA (6th Edition):
Garner, C. I. (2015). Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies. (Thesis). University of Mississippi. Retrieved from https://egrove.olemiss.edu/etd/519
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):
Garner, Corey Isaac. “Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies.” 2015. Thesis, University of Mississippi. Accessed April 13, 2021.
https://egrove.olemiss.edu/etd/519.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Garner, Corey Isaac. “Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies.” 2015. Web. 13 Apr 2021.
Vancouver:
Garner CI. Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies. [Internet] [Thesis]. University of Mississippi; 2015. [cited 2021 Apr 13].
Available from: https://egrove.olemiss.edu/etd/519.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Garner CI. Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies. [Thesis]. University of Mississippi; 2015. Available from: https://egrove.olemiss.edu/etd/519
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Melbourne
27.
Achmari, Panji.
Characterisation of sub-radiant modes of metasurfaces.
Degree: 2016, University of Melbourne
URL: http://hdl.handle.net/11343/129429
► Metallic nanostructures can be utilised as optical antennas: devices to assist the conversion between localised (near-field) and propagating (far-field) light. Optical antennas possess sub-radiant modes…
(more)
▼ Metallic nanostructures can be utilised as optical antennas: devices to assist the conversion between localised (near-field) and propagating (far-field) light. Optical antennas possess sub-radiant modes which cannot be easily coupled to propagating fields and have the advantages of longer life-times and higher Q resonances. This project has involved the computational and experimental investigation of the properties of sub-radiant modes of various nanoantennas that form the basis of a metasurface. These modes were found to be excited by off-normally incident light with a specific polarisation or vector beams with radial or azimuthal polarisation. It was also shown through studies of the optical far-field that the angular spectrum of the reflected fields was modified through interaction via a sub-radiant mode.
Subjects/Keywords: dark mode; metasurface; optical antenna; optics; sub-radiant mode
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Achmari, P. (2016). Characterisation of sub-radiant modes of metasurfaces. (Masters Thesis). University of Melbourne. Retrieved from http://hdl.handle.net/11343/129429
Chicago Manual of Style (16th Edition):
Achmari, Panji. “Characterisation of sub-radiant modes of metasurfaces.” 2016. Masters Thesis, University of Melbourne. Accessed April 13, 2021.
http://hdl.handle.net/11343/129429.
MLA Handbook (7th Edition):
Achmari, Panji. “Characterisation of sub-radiant modes of metasurfaces.” 2016. Web. 13 Apr 2021.
Vancouver:
Achmari P. Characterisation of sub-radiant modes of metasurfaces. [Internet] [Masters thesis]. University of Melbourne; 2016. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/11343/129429.
Council of Science Editors:
Achmari P. Characterisation of sub-radiant modes of metasurfaces. [Masters Thesis]. University of Melbourne; 2016. Available from: http://hdl.handle.net/11343/129429

Duke University
28.
Liu, Xiaojun.
modeling and application of nonlinear metasurface
.
Degree: 2018, Duke University
URL: http://hdl.handle.net/10161/16787
► A patterned metasurface can strongly scatter incident light, functioning as an extremely low-profile lens, filter, reflector or other optical devices. Nonlinear metasurfaces‒combine the properties…
(more)
▼ A patterned
metasurface can strongly scatter incident light, functioning as an extremely low-profile lens, filter, reflector or other optical devices. Nonlinear metasurfaces‒combine the properties of natural nonlinear medium with novel features such as negative refractive index, magneto-electric coupling‒provide novel nonlinear features not available in nature. Compared to conventional optical components that often extend many wavelengths in size, nonlinear metasurfaces are flexible and extremely compact. Characterization of a nonlinear
metasurface is challenging, not only due to its inherent anisotropy, but also because of the rich wave interactions available. This thesis presents an overview of the work by the author in modeling and application of nonlinear metasurfaces. Analytical methods - transfer matrix method and surface homogenization method - for characterizing nonlinear metasurfaces are presented. A generalized transfer matrix method formalism for four wave mixing is derived, and applied to analyze nonlinear interface, film, and metallo-dielectric stack. Various channels of plasmonic and Fabry-perot enhancement are investigated. A homogenized description of nonlinear metasurfaces is presented. The homogenization procedure is based on the nonlinear generalized sheet transition conditions (GSTCs), where an optically thin nonlinear
metasurface is modeled as a layer of dipoles radiating at fundamental and nonlinear frequencies. By inverting the nonlinear GSTCs, a retrieval procedure is developed to retrieve the nonlinear parameters of the nonlinear
metasurface. As an example, we investigate a nonlinear
metasurface which presents nonlinear magnetoelectric coupling in near infrared regime. The method is expected to apply to any patterned
metasurface whose thickness is much smaller than the wavelengths of operation, with inclusions of arbitrary geometry and material composition, across the electromagnetic spectrum. The second part presents the applications of nonlinear metasurfaces. First, we show that the third-harmonic generation (THG) can be drastically enhanced by the nonlinear metasurfaces – film-coupled nanostripes. The large THG enhancement is experimentally and theoretically demonstrated. With numerical simulations, we present methods to clarify the origin of the THG from the
metasurface. Second, the enhanced two-photon photochormism is investigated by integrating spiropyrans with film-coupled nanocubes. This
metasurface platform couples almost 100% energy at resonance, and induces isomerization of spiropyrans to merocyanines. Due to the large Purcell enhancement introduced by the film-coupled nanocubes, fluorescence lifetime measurements on the merocyanine form reveal large enhancements on spontaneous emission rate, as well as high quantum efficiency. We show that this
metasurface platform is capable of storing information, supports reading and writing with ultra-low power, offering new possibilities in optical data storage.
Advisors/Committee Members: Smith, David R (advisor).
Subjects/Keywords: Electrical engineering;
Computational physics;
electromagnetics;
metamaterials;
nonlinear metasurface;
nonlinear optics;
plasmonics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, X. (2018). modeling and application of nonlinear metasurface
. (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/16787
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):
Liu, Xiaojun. “modeling and application of nonlinear metasurface
.” 2018. Thesis, Duke University. Accessed April 13, 2021.
http://hdl.handle.net/10161/16787.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Xiaojun. “modeling and application of nonlinear metasurface
.” 2018. Web. 13 Apr 2021.
Vancouver:
Liu X. modeling and application of nonlinear metasurface
. [Internet] [Thesis]. Duke University; 2018. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10161/16787.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu X. modeling and application of nonlinear metasurface
. [Thesis]. Duke University; 2018. Available from: http://hdl.handle.net/10161/16787
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Boston University
29.
Ghaffarivardavagh, Reza.
Tailoring acoustic waves with metamaterials and metasurfaces.
Degree: PhD, Mechanical Engineering, 2019, Boston University
URL: http://hdl.handle.net/2144/37109
► Nowadays, metamaterials have found their places in different branches of wave physics ranging from electromagnetics to acoustic waves. Acoustic metamaterials are sub-wavelength structures in which…
(more)
▼ Nowadays, metamaterials have found their places in different branches of wave physics ranging from electromagnetics to acoustic waves. Acoustic metamaterials are sub-wavelength structures in which their effective acoustic properties are dominated by their structural shape rather than their constitutive materials. In recent years, acoustic metamaterials have gained increasing interest due to numerous promising applications such as sub-wavelength imaging, perfect absorption, acoustic cloaking, etc. The focus of the work herein is to leverage acoustic metamaterial/
metasurface structures to manipulate the acoustic wavefront to pave the road for future applications of the metamaterials.
In the first part of the work, the metamaterial structure is introduced, which can be leveraged for better manipulation of the transmitted wave by modulating both phase and amplitude. Initially, a general bound on the transmission phase/amplitude space for the case of arbitrary
metasurface has been presented and subsequently, the necessary condition for the complete modulation of the transmitted wave is investigated. Next, a horn-like space coiling metamaterial is introduced, which satisfied the aforementioned condition and enabled us to simultaneously modulate both the phase and amplitude of the transmitted wave. Furthermore, our initial efforts toward designing a metamaterial capable of real-time phase modulation with relatively constant amplitude will be discussed.
In the second part of this work, a novel metamaterial-based methodology is presented for the design of the air-permeable acoustic silencer. In this work, the concept of the bilayer-transverse metamaterial is introduced, and its functionality for silencing the acoustic wave is demonstrated. Furthermore, it is shown that the methodology presented herein essentially does not limit the ratio of the open area, and ultra-open metamaterial silencers may be designed. Eventually, based on the presented methodology, the ultra-open metamaterial featuring nearly 60% open area is designed, and silencing capacity of about 94% at the targeted frequency is experimentally realized.
In the last part of this work, the behavior of a locally resonant class of acoustic metamaterial in the non-Rayleigh regime has been explored. Elaborately, it is demonstrated that in the case of spherical inclusion in a matrix material, large variation in the effective acoustic impedance emerges near the inclusion’s Eigenmode. Eventually, the potential application of this novel phenomenon in the non-destructive evaluation (NDE) and ultrasound imaging is discussed.
Advisors/Committee Members: Zhang, Xin (advisor).
Subjects/Keywords: Acoustics; Metamaterials; Metasurface; NDE; Silencer; Ultra-open; Wavefront
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ghaffarivardavagh, R. (2019). Tailoring acoustic waves with metamaterials and metasurfaces. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/37109
Chicago Manual of Style (16th Edition):
Ghaffarivardavagh, Reza. “Tailoring acoustic waves with metamaterials and metasurfaces.” 2019. Doctoral Dissertation, Boston University. Accessed April 13, 2021.
http://hdl.handle.net/2144/37109.
MLA Handbook (7th Edition):
Ghaffarivardavagh, Reza. “Tailoring acoustic waves with metamaterials and metasurfaces.” 2019. Web. 13 Apr 2021.
Vancouver:
Ghaffarivardavagh R. Tailoring acoustic waves with metamaterials and metasurfaces. [Internet] [Doctoral dissertation]. Boston University; 2019. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2144/37109.
Council of Science Editors:
Ghaffarivardavagh R. Tailoring acoustic waves with metamaterials and metasurfaces. [Doctoral Dissertation]. Boston University; 2019. Available from: http://hdl.handle.net/2144/37109

University of Pennsylvania
30.
Chen, Wenxiang.
Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing.
Degree: 2017, University of Pennsylvania
URL: https://repository.upenn.edu/edissertations/2217
► Metamaterials are artificial materials designed to create optical properties that do not exist in nature. They are assemblies of subwavelength structures that are tailored in…
(more)
▼ Metamaterials are artificial materials designed to create optical properties that do not exist in nature. They are assemblies of subwavelength structures that are tailored in size, shape, composition, and orientation to realize the desired property. Metamaterials are promising for applications in diverse areas: optical filters, lenses, holography, sensors, photodetectors, photovoltaics, photocatalysts, medical devices, and many more, because of their excellent abilities in bending, absorbing, enhancing and blocking light. However, the practical use of metamaterials is challenged by the lack of plasmonic materials with proper permittivity for different applications and the slow and expensive fabrication methods available to pattern sub-wavelength structures. We have also only touched the surface in exploring the innovative uses of metamaterials to solve world problems.
In this thesis, we study the fundamental optical properties of metamaterial building blocks by designing material permittivity. We continuously tune the interparticle distance in colloidal Au nanocrystal (NC) solids via the partial ligand exchange process. Then we combine top-down nanoimprint lithography with bottom-up assembly of colloidal NCs to develop a large-area, low-cost fabrication method for subwavelength nanostructures. Via this method, we fabricate and characterize nano-antenna arrays of different sizes and demonstrate metasurface quarter wave-plates of different bandwidth, and compare their performances with simulation results.
We also integrate the metasurfaces with chemically- and mechanically-responsive polymers for strong-signal sensing. In the first design, we combine ultrathin plasmonic nanorods with hydrogel to fabricate optical moisture sensors for agricultural use. In the second application, we design mechanically tunable Au grating resonances on a polydimethylsiloxane (PDMS) substrate. The dimensions of Au grating are carefully engineered to achieve a hybridized, ultrasharp, and ultrasensitive resonance peak.
Subjects/Keywords: Metasurface; Nanocrsytal; PDMS; Plasmonics; Sensor; Engineering; Nanoscience and Nanotechnology; Optics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, W. (2017). Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing. (Thesis). University of Pennsylvania. Retrieved from https://repository.upenn.edu/edissertations/2217
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):
Chen, Wenxiang. “Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing.” 2017. Thesis, University of Pennsylvania. Accessed April 13, 2021.
https://repository.upenn.edu/edissertations/2217.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Wenxiang. “Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing.” 2017. Web. 13 Apr 2021.
Vancouver:
Chen W. Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing. [Internet] [Thesis]. University of Pennsylvania; 2017. [cited 2021 Apr 13].
Available from: https://repository.upenn.edu/edissertations/2217.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen W. Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing. [Thesis]. University of Pennsylvania; 2017. Available from: https://repository.upenn.edu/edissertations/2217
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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