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University of Manchester
1.
Nouman, Muhammad.
INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD.
Degree: 2015, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:259435
► The finite dierence time domain (FDTD) method is based on Yee algorithmwhich employs a very simple way to discretize maxwell equations. Any structureof interest is…
(more)
▼ The finite dierence time domain (FDTD) method is
based on Yee algorithmwhich employs a very simple way to discretize
maxwell equations. Any structureof interest is decomposed into
cubic unit cells called voxels and the size of thearea that can be
simulated is limited by computer resources.LOD method is an
alternative method for the application of the FDTDmethod and it is
by design implicit in nature. Implicit methods were introducedto
overcome the time step limation inherent in the conventional
explicit methods.This implies that a larger time step can be used
for the computational domainwhen compared to the normal explicit
FDTD method. This results in the speedup of the overall simulation
time, highly desirable when electromagnetic fieldsare to be
determined for a large computational space or whenever objects
havingvery fine details are to be modeled.However during simulation
as the wave propagates outward, it will eventuallycome to the edge
of the allowable space, which is dictated by how the arrayshave
been dimensioned in the program. If nothing were done to address
this,unpredictable reflections would be generated that will go back
inward. Thus,there would be no way to determine which is the real
wave and which is thereflected noise.This is the reason that
Absorbing Boundary Conditions (ABCs) have beenan issue for as long
as FDTD has been used. In using these absorbing boundaryconditions
the objective is to achieve an ideal ABC which absorbs all the
outgoingwaves and produces no reflection, along with catering for
all incident angles of thewaves propagating towards it. The idea is
to simulate the open space in such away that the waves appear to
propagate indefinitely. Huygens Absorbing boundaryconditions (HABC)
are proactive in both in its design and implementation.
Theyincorporate the idea of a hypothetical "Huygens surface"
separating the two connectingfield regions such that any field
propagating towards the HABC can becanceled by generating a counter
field that is equal in magnitude and opposite indirection to its
original counterpart.
CD-ROM containing supplementary codes submitted in
pocket inside back cover of print version of
thesis.'
Advisors/Committee Members: Costen, Fumie.
Subjects/Keywords: FDTD; LOD-FDTD; HABC
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APA (6th Edition):
Nouman, M. (2015). INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:259435
Chicago Manual of Style (16th Edition):
Nouman, Muhammad. “INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD.” 2015. Doctoral Dissertation, University of Manchester. Accessed February 27, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:259435.
MLA Handbook (7th Edition):
Nouman, Muhammad. “INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD.” 2015. Web. 27 Feb 2021.
Vancouver:
Nouman M. INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD. [Internet] [Doctoral dissertation]. University of Manchester; 2015. [cited 2021 Feb 27].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:259435.
Council of Science Editors:
Nouman M. INTRODUCTION OF HUYGENS ABSORBING BOUNDARY CONDITIONS
INTO LOD METHOD FOR FDTD. [Doctoral Dissertation]. University of Manchester; 2015. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:259435
2.
Mbaye, Mame Diarra.
Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues.
Degree: Docteur es, Electronique, Optronique et Systèmes, 2018, Université Paris-Est
URL: http://www.theses.fr/2018PESC1144
► Le développement constant des systèmes de communication soulèvent des inquiétudes sur l’influence des ondes électromagnétique sur le corps humain. Une législation existante permet de rassurer…
(more)
▼ Le développement constant des systèmes de communication soulèvent des inquiétudes sur l’influence des ondes électromagnétique sur le corps humain. Une législation existante permet de rassurer la population, mais, l’exposition quotidienne, souvent multi sources implique des interrogations sur ces nouveaux types d’usages. La méthode des Différence Finies dans le Domaine Temporel (FDTD) permet d’évaluer avec précision le niveau d’exposition a été décrit dans ce manuscrit. Cependant, cette méthode présente des limites si on souhaite représenter des structures présentant des courbures du fait de l’usage de mailles orthogonales. Ce manuscrit est une contribution à la problématique en développant une méthode de FDTD conforme dont les mailles suivent la forme des objets à modéliser. Même si, quelques méthodes de FDTD conforme existantes dans la littérature seront au préalable présentées. Dans cette étude, un soin particulier sera porté sur la validation de la méthode développée à travers plusieurs types de maillages différents et en comparant les résultats obtenus avec HFSS et la FDTD classique. Le débit d’absorption spécifique (DAS) sera également calculé en homogénéisant les tissus humains par pondération volumique. Ce qui permettra de réduire les temps de calcul
The constant development of communication systems raises concerns about the influence of electromagnetic waves on human body. Existing legislation helps to reassure population, but daily exposure, often multi-source, involves questions about these new types of use. The Time Domain Finite Difference (FDTD) method allows accurate assessment of the level of exposure described in this manuscript. However, this method has limitations if it is desired to represent structures with curvatures due to the use of orthogonal meshes. This manuscript is a contribution to the problem by developing a conformal FDTD method whose meshes follow the shape of the objects to be modeled. Even so, some existing FDTD compliant methods in the literature will be presented beforehand. In this study, particular attention will be paid to the validation of the method developed through several different types of meshes and comparing results obtained with HFSS and conventional FDTD. The specific absorption rate (SAR) will also be calculated by homogenizing human tissues by volume weighting. This will reduce computing time
Advisors/Committee Members: Picon, Odile (thesis director).
Subjects/Keywords: Fdtd; Das; Homogénéisation; Fdtd; Sar; Homogenization
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mbaye, M. D. (2018). Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2018PESC1144
Chicago Manual of Style (16th Edition):
Mbaye, Mame Diarra. “Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues.” 2018. Doctoral Dissertation, Université Paris-Est. Accessed February 27, 2021.
http://www.theses.fr/2018PESC1144.
MLA Handbook (7th Edition):
Mbaye, Mame Diarra. “Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues.” 2018. Web. 27 Feb 2021.
Vancouver:
Mbaye MD. Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues. [Internet] [Doctoral dissertation]. Université Paris-Est; 2018. [cited 2021 Feb 27].
Available from: http://www.theses.fr/2018PESC1144.
Council of Science Editors:
Mbaye MD. Méthode FDTD conforme appliquée au calcul du DAS avec homogénéisation utilisant les caractéristiques des tissus humains : Conformal FDTD applied to SAR calculation with homogenization using characteristics of human tissues. [Doctoral Dissertation]. Université Paris-Est; 2018. Available from: http://www.theses.fr/2018PESC1144

North Carolina State University
3.
Mayhew, Rebecca.
Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device.
Degree: MS, Electrical Engineering, 2010, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/6315
► This research studies the currents generated within the human body when subjected to a Human Electro-Muscular Incapacitation (HEMI) device – commonly known as a Stun…
(more)
▼ This research studies the currents generated within the human body when subjected to a Human Electro-Muscular Incapacitation (HEMI) device – commonly known as a Stun Gun. The currents are calculated using the grid based Finite-Difference Time-Domain (
FDTD) method of computational electromagnetics.
The
FDTD technique consists of first defining the Computational Domain - in this case the model of a human torso and a HEMI device. Then the electromagnetic source is defined and the
FDTD algorithm and boundary logic is applied to the computational domain to calculate the magnetic and electric fields within the model. In this research, changes were made to the model of the electromagnetic source and to the model of the human torso in order to determine the changes’ effects on the peak currents observed at key observation points within the body.
The electromagnetic source was modeled as both a gap current source and a magnetic frill source. The input signal waveform and the length of wires connecting the HEMI device to the
subject were changed. In addition, the probe penetration depth, probe separation width, and probe contact locations were all changed. Finally, changes to the human torso model were made, including modeling the skin in wet and dry conditions, as well as adding clothing of various thickness and electromagnetic properties.
This research shows that modeling the source as a gap source or magnetic frill are equivalent and the length of the wires connecting the HEMI device to the
subject has no impact on the currents within the body. It also shows that probe penetration and probe separation increase the current penetration into the body. Wet skin, or any slightly conductive layer, reduces current penetration to a greater degree than clothing with no conductive properties. However, the greatest impact on the currents at set observation points within the body was the location of the contact probes. This suggests that when a person is shot with a HEMI device, the location of impact of the probes has more of an effect on the currents that a person is
subject to than the depth or separation of the probes, or whether the person was wet or wearing clothes.
Advisors/Committee Members: Dr. Leda Lunardi, Committee Member (advisor), Dr. H Troy Nagle, Committee Member (advisor), Dr. Gianluca Lazzi, Committee Chair (advisor).
Subjects/Keywords: HEMI; electromagnetics; FDTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mayhew, R. (2010). Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/6315
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):
Mayhew, Rebecca. “Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device.” 2010. Thesis, North Carolina State University. Accessed February 27, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/6315.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mayhew, Rebecca. “Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device.” 2010. Web. 27 Feb 2021.
Vancouver:
Mayhew R. Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device. [Internet] [Thesis]. North Carolina State University; 2010. [cited 2021 Feb 27].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/6315.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mayhew R. Finite-Difference Time-Domain Analysis of Currents from a Human Electro-Muscular Incapacitation Device. [Thesis]. North Carolina State University; 2010. Available from: http://www.lib.ncsu.edu/resolver/1840.16/6315
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
4.
Hsieh, Hsi-yun.
A GUI for Assisting FDTD Computations.
Degree: Master, Electrical Engineering, 2008, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132421
► In the past when we use the FDTD method to analyze electromagnetic problems, it has to properly discretize the structure and time, then analyze by…
(more)
▼ In the past when we use the
FDTD method to analyze electromagnetic problems, it has to properly discretize the structure and time, then analyze by C code. Before analyzing microstrip structures, we have to calculate and draw the distribution of structure on the grid paper. In order to increase the efficiency of drawing structure and coding, we design a GUI that it can draw and discretize the structure properly. This GUI can generate the most appropriate grid size for the user, reduce the distortion. Then, when we are coding the
FDTD analysis program according to the output file, we can replace the parts of setting structure and material parameters with reading data and retain the parts of
FDTD algorithm and absorbing boundary condition.
Advisors/Committee Members: Ken-Huang Lin (chair), Chih-Wen Kuo (committee member), Chie-In Lee (chair), Tzyy-Sheng Horng (chair).
Subjects/Keywords: Orthogonal; GUI; Uniform; FDTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hsieh, H. (2008). A GUI for Assisting FDTD Computations. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132421
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):
Hsieh, Hsi-yun. “A GUI for Assisting FDTD Computations.” 2008. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132421.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hsieh, Hsi-yun. “A GUI for Assisting FDTD Computations.” 2008. Web. 27 Feb 2021.
Vancouver:
Hsieh H. A GUI for Assisting FDTD Computations. [Internet] [Thesis]. NSYSU; 2008. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132421.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hsieh H. A GUI for Assisting FDTD Computations. [Thesis]. NSYSU; 2008. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132421
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
5.
Lin, Yu-Pin.
An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures.
Degree: Master, Communications Engineering, 2009, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730109-155853
► Using analytical formula to estimate a complex problem of cavity based on a transmission line approach is called the ETL (Equivalent Transmission Line) method .…
(more)
▼ Using analytical formula to estimate a complex problem of cavity based on a transmission line approach is called the ETL (Equivalent Transmission Line) method .
Operating frequency of dominant mode of standard case is several hundreds of megahertz that is lower than frequency of CPU, higher-order mode must be considered . Several papers always discuss a single aperture that does not correspond to practical array of apertures of case .Array of apertures can be estimated using analytical formula and higher-order mode can be considered in this paper .Usually array of apertures is not placed at the center of metallic plate, we can modify the analytical formula to get ETL of shifted array of apertures.
To consider industrial design and esthetics, many possible shape of array of apertures are discussed by adapting to the ETL method .The problem of how to improve the shielding effectiveness of array of apertures is treated in the latter half of this thesis.
The
FDTD (Finite-Difference Time Domain) method is a full-wave analytical algorithm and is not efficient for analyzing cavity. Advantage of ETL is that it is faster than full-wave analytical algorithm .However, traditional ETL can not get accurate level of shielding effectiveness without higher-order modes. Thus improved ways are introduced in the paper to simulate practical array of apertures to reach the result of good agreement and short computing time.
Advisors/Committee Members: Chih-Wen Kuo (committee member), Ken-Huang Lin (chair), Tzyy-Sheng Horng (chair), Chie-In Lee (chair).
Subjects/Keywords: Array of Apertures; FDTD; ETL
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lin, Y. (2009). An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730109-155853
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, Yu-Pin. “An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures.” 2009. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730109-155853.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lin, Yu-Pin. “An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures.” 2009. Web. 27 Feb 2021.
Vancouver:
Lin Y. An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures. [Internet] [Thesis]. NSYSU; 2009. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730109-155853.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lin Y. An Efficient Evaluation Scheme of Shielding Effectiveness of Rectangular Enclosures with Array of Small Apertures. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730109-155853
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Mississippi State University
6.
Jones, Charles Rees.
THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS.
Degree: PhD, Electrical and Computer Engineering, 2011, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07072011-163038/
;
► In the effort to simulate the biologically inspired continuum robots dynamic capabilities, researchers have been faced with the daunting task of simulatingin real-timethe complete…
(more)
▼ In the effort to simulate the biologically inspired continuum robots dynamic capabilities,
researchers have been faced with the daunting task of simulatingin real-timethe
complete three dimensional dynamics of the the beam-like structure which includes the
three stiff degrees-of-freedom transverse and dilational shear. Therefore, researchers
have traditionally limited the difficulty of the problem with simplifying assumptions. This
study, however, puts forward a solution which makes no simplifying assumptions and
trades off only the real-time requirement of the desired solution.
The solution is a Finite Difference Time Domain method employing an explicit single
step method with cheap right hands sides. The cheap right hand sides are the result
of a rather ingenious formulation of the classical beam called the Cosserat rod by, first,
the Cosserat brothers and, later, Stuart S. Antman which results in five nonlinear but uncoupled
equations that require only multiplication and addition. The method is therefore
suitable for hardware implementation thus moving the real-time requirement from a software
solution to a hardware solution.
Advisors/Committee Members: Nicolas H. Younan (chair), Bryan A. Jones (chair), Ratnasingham Shivaji (committee member), Douglas Bammann (committee member).
Subjects/Keywords: FDTD; numerical methods; cosserat rod
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jones, C. R. (2011). THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-07072011-163038/ ;
Chicago Manual of Style (16th Edition):
Jones, Charles Rees. “THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS.” 2011. Doctoral Dissertation, Mississippi State University. Accessed February 27, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-07072011-163038/ ;.
MLA Handbook (7th Edition):
Jones, Charles Rees. “THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS.” 2011. Web. 27 Feb 2021.
Vancouver:
Jones CR. THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS. [Internet] [Doctoral dissertation]. Mississippi State University; 2011. [cited 2021 Feb 27].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07072011-163038/ ;.
Council of Science Editors:
Jones CR. THE 3D DYNAMICS OF THE COSSERAT ROD AS APPLIED TO CONTINUUM ROBOTICS. [Doctoral Dissertation]. Mississippi State University; 2011. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07072011-163038/ ;

Texas A&M University
7.
Al-Khaldi, Mohammad Mazen Mohammad.
A Finite Difference Time Domain Study on the Design of Microwave Catheters.
Degree: MS, Electrical Engineering, 2017, Texas A&M University
URL: http://hdl.handle.net/1969.1/165697
► .An investigation of the design aspects along with proposed improvements in the construction of microwave ablation catheters are reported in this thesis. The computational methods…
(more)
▼ .An investigation of the design aspects along with proposed improvements in the construction of microwave ablation catheters are reported in this thesis. The computational methods used to carry out this research include an in-house created cylindrical coordinate rotationally symmetric Finite Difference Time Domain (
FDTD) scheme.
Firstly, a systematic means of modelling and designing microwave catheters is proposed. The method capitalizes on the rotationally symmetric nature of the microwave catheter and reduces the design from three dimensions to a two-dimensional problem.
Secondly issues related to resonant frequency and leaky waves, an inherent property of microwave ablation, are investigated and subsequent solutions are proposed. For the issue of resonant frequency, the addition of a terminating cap halves the catheter’s resonant frequency allowing for acceptable return loss, less than -10 dB, at a resonant frequency of 2.7 GHz without a sleeve choke and 2.45 GHz with a choke.
Several designs are investigated in order to eliminate the power coupled into waves travelling along the coaxial feedline’s exterior. The proposed catheter design with the sleeve choke is successful at eliminating surface waves whilst attaining a return loss of -14.61 dB at resonance. The internally matched catheter is equally as effective and attains a return loss of -49.39 dB at resonance while the catheter with a floating sleeve only partially reduces the amplitude of surface waves whilst achieving a return loss of -39.08 dB at resonance. The effectiveness of adding a dielectric cylinder around the monopole in order to improve return loss, bandwidth and overall Specific Absorption Rate (SAR) distribution is also investigated.
Near to far field transformations are implemented and the far field pattern of the catheter is shown to be that of a dipole, at resonance. Furthermore, a dispersive
FDTD algorithm is developed to incorporate a metamaterial plug. The effects of this are shown to be highly dependent on the dielectric properties of the metamaterial and act to lower the resonant frequency allowing for overall length reductions. Finally, the bioheat equation is investigated and is implemented in the context of microwave catheters by analyzing temperature rise at varying radial distances from the catheter.
Advisors/Committee Members: Chang, Kai (advisor), Nevels, Robert D (advisor), Wright, Steven M (committee member), Su, Chin B (committee member).
Subjects/Keywords: FDTD; Catheters; Microwave; Electromagnetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Al-Khaldi, M. M. M. (2017). A Finite Difference Time Domain Study on the Design of Microwave Catheters. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165697
Chicago Manual of Style (16th Edition):
Al-Khaldi, Mohammad Mazen Mohammad. “A Finite Difference Time Domain Study on the Design of Microwave Catheters.” 2017. Masters Thesis, Texas A&M University. Accessed February 27, 2021.
http://hdl.handle.net/1969.1/165697.
MLA Handbook (7th Edition):
Al-Khaldi, Mohammad Mazen Mohammad. “A Finite Difference Time Domain Study on the Design of Microwave Catheters.” 2017. Web. 27 Feb 2021.
Vancouver:
Al-Khaldi MMM. A Finite Difference Time Domain Study on the Design of Microwave Catheters. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1969.1/165697.
Council of Science Editors:
Al-Khaldi MMM. A Finite Difference Time Domain Study on the Design of Microwave Catheters. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165697

Penn State University
8.
Luo, Wei.
On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging.
Degree: 2014, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/22616
► High dielectric materials (HDM) have been used to improve aspects of MRI such as decreasing specific absorption rate (SAR), increasing local signal-to-noise ratio (SNR), and…
(more)
▼ High dielectric materials (HDM) have been used to improve aspects of MRI such as decreasing specific absorption rate (SAR), increasing local signal-to-noise ratio (SNR), and enhancing the excitation homogeneity, resulting in an improvement of MRI safety and an increase in imaging quality. The use of HDM comes with a relatively low cost and the HDM could be directly incorporated into the existing clinical practices without additional changes in MRI sequence and patient care. In the current research and development of HDM in MRI, there are several challenges. For example, (I) limited material has been introduced or created as HDM in MRI. (II) New measurement technique may be required to measure the electrical properties of a new HDM in the frequency range that is relevant to MRI. (III) Advanced optimization method is demanded to combine with numerical simulations to design the MRI coil incorporating HDM. (IV) The lack of a fair comparison between the coil design incorporating HDM and the coil design without HDM is one of the reasons that the coil engineers hesitate to use HDM in their design. (V) There is no general guideline on the usage of HDM for clinical practice and this is another reason that slows the development of HDM.
Two different studies were discussed in this dissertation to advance the research and development of HDM in MRI. In the first study, a new HDM consisting of sintered BaTiO3 beads in deuterated water was created for MRI applications. This material has a much higher relative permittivity compared to all of the dielectric materials developed before. The relative permittivity and electrical conductivity of this new HDM were characterized at 3T (at approximately 125 MHz) and 7T (at approximately 300 MHz) using resonant cavities. Its superior performance in MRI was demonstrated by comparing the transmit efficiency, receive sensitivity, and SNR to previously used dielectric materials in simulation and experiment at 3T. This new HDM was later used to improve MRI performance in a spine imaging.
In the second study, an attempt was made (I) to answer the question that whether an optimal MRI coil incorporated with HDM would outperform an optimal MRI coil without HDM and (II) to explore the improvement in coil efficiency brought by the effect of HDM. A simple hybrid design consisting of a loop coil and an HDM disk was optimized to image a lossy sphere at 123 MHz in electromagnetic simulation using particle swarm optimization. The coil location, coil radius, HDM location, HDM geometry, and HDM material properties were considered together as parameters in the optimization. The performance of the optimal hybrid design for imaging at any depth in the lossy sphere along the coil axis turned out to be better than the corresponding optimal Coil-only design, with an average of 87% and 23% improvement in coil efficiency for locations near the center and periphery of the sphere, respectively. This result showed, for the first time, that an optimal MRI coil incorporated with HDM would outperform an optimal MRI coil…
Advisors/Committee Members: Qing X Yang, Dissertation Advisor/Co-Advisor, Qing X Yang, Committee Chair/Co-Chair, Akhlesh Lakhtakia, Committee Member, Michael T Lanagan, Committee Member, Osama O Awadelkarim, Committee Member, Thomas Neuberger, Committee Member, Christopher Collins, Special Member.
Subjects/Keywords: MRI; FDTD; Dielectric Material
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APA ·
Chicago ·
MLA ·
Vancouver ·
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APA (6th Edition):
Luo, W. (2014). On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/22616
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):
Luo, Wei. “On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging.” 2014. Thesis, Penn State University. Accessed February 27, 2021.
https://submit-etda.libraries.psu.edu/catalog/22616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Luo, Wei. “On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging.” 2014. Web. 27 Feb 2021.
Vancouver:
Luo W. On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging. [Internet] [Thesis]. Penn State University; 2014. [cited 2021 Feb 27].
Available from: https://submit-etda.libraries.psu.edu/catalog/22616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Luo W. On The Potential For Passive Dielectric Materials To Improve Safety And Performance Of Magnetic Resonance Imaging. [Thesis]. Penn State University; 2014. Available from: https://submit-etda.libraries.psu.edu/catalog/22616
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North Carolina State University
9.
Kwatra, Nitin.
Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method.
Degree: MS, Electrical Engineering, 2009, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/1297
► The Alternating-Direction Implicit Finite-Difference Time-Domain (ADI-FDTD) method is a computational electromagnetic method which, unlike the traditional explicit FDTD method, is unconditionally stable and allows arbitrarily…
(more)
▼ The Alternating-Direction Implicit Finite-Difference Time-Domain (ADI-
FDTD) method is a computational electromagnetic method which, unlike the traditional explicit
FDTD method, is unconditionally stable and allows arbitrarily large time steps. The decrease in the simulation time is achieved at the cost of accuracy. However, in computational problems where the results are averaging based, the effects of such local errors are largely minimized. For example, using ADI-
FDTD in bioelectromagnetics, quantities like Specific Absorption Rates (SAR) and total induced currents can be computed over models with fine geometrical resolutions without decreasing the time step proportionally.
In this work, the volume of neurons excited (recruitment volume) inside a human body due to external electric or magnetic stimulation is computed using the D-H formulation of ADI-
FDTD method. The electric stimulation considered is through current injection by contact electrodes of a Human Electro-Muscular Incapacitative (HEMI) device. For magnetic stimulation, two high frequency current pulses flowing in opposite directions in circular coils are considered. A neuron can be excited if the electric field or the gradient of the electric field along its length exceeds the nerve threshold value. These modes of excitation are termed as `end mode' and `center mode' respectively. The nerve excitation threshold values are decided based on experimental investigations on laboratory animals found in the literature.
Memory and simulation time requirements are reduced by employing expanding grid techniques and DFT averaging. The uniform grid of a 1 mm resolution model is logarithmically expanded to 5 mm in region far from source such as head, lower legs and arms. This reduces the computational size of the model by 90%. For HEMI current source stimulations, Discrete Fourier Transform (DFT) is used to find the induced electric fields due to the dominant frequencies in the current source. By using quasi-static assumptions, the DFT is evaluated for duration substantially lesser than the time period of the different frequencies. The field values are then obtained as the ratios to the fields at the source and then scaled depending upon the magnitude of the source.
This study builds upon the efficient use of use of ADI-
FDTD method for the solution of the low frequency bioelectromagnetics problems by employing expanding grid techniques and DFT averaging. Recruitment volumes due to a HEMI current source device are computed. A novel stimulation technique of magnetic stimulation is investigated.
Advisors/Committee Members: Dr. J. K. Townsend, Committee Member (advisor), Dr. Griff. L. Bilbro, Committee Member (advisor), Dr. Gianluca Lazzi, Committee Chair (advisor).
Subjects/Keywords: recruitment volume; FDTD; ADI
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kwatra, N. (2009). Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1297
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):
Kwatra, Nitin. “Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method.” 2009. Thesis, North Carolina State University. Accessed February 27, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/1297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kwatra, Nitin. “Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method.” 2009. Web. 27 Feb 2021.
Vancouver:
Kwatra N. Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method. [Internet] [Thesis]. North Carolina State University; 2009. [cited 2021 Feb 27].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/1297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kwatra N. Computation of recruitment volumes in the human body due to external electric or magnetic stimulation using ADI-FDTD method. [Thesis]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1297
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto
10.
Yu, Xue.
FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications.
Degree: 2013, University of Toronto
URL: http://hdl.handle.net/1807/35703
► Graphene is a single atomic layer of graphite and has many extraordinary properties. Many graphene based applications have been proposed in recent years and the…
(more)
▼ Graphene is a single atomic layer of graphite and has many extraordinary properties. Many graphene based applications have been proposed in recent years and the need of a time domain simulation tool for studying graphene based devices emerges. This thesis focuses on developing a simulation framework for graphene based devices using finite-difference time-domain (FDTD) method. Formulation for a perfectly matched layer (PML) for the sub-cell FDTD method for thin dispersive layers has been derived and implemented. Such a PML is useful when thin layers extend to the boundaries of the computational domain. Using the sub-cell PML formulation to model the graphene thin layers significantly reduces the computational cost compared to using the conventional FDTD. The proposed formulation is accompanied by detailed validation and error analysis studies. Several graphene applications are simulated using the new framework and the results show good agreement with the respective analytical models.
MAST
Advisors/Committee Members: Sarris, Costas D., Electrical and Computer Engineering.
Subjects/Keywords: computational electromagnetics; FDTD; 0544
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yu, X. (2013). FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/35703
Chicago Manual of Style (16th Edition):
Yu, Xue. “FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications.” 2013. Masters Thesis, University of Toronto. Accessed February 27, 2021.
http://hdl.handle.net/1807/35703.
MLA Handbook (7th Edition):
Yu, Xue. “FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications.” 2013. Web. 27 Feb 2021.
Vancouver:
Yu X. FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1807/35703.
Council of Science Editors:
Yu X. FDTD Modeling of Graphene-based RF Devices: Fundamental Aspects and Applications. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/35703

Rice University
11.
Cao, Yang.
Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure.
Degree: PhD, Natural Sciences, 2015, Rice University
URL: http://hdl.handle.net/1911/87717
► Plasmon is considered to be the incompressible self-oscillation of conducting electrons in small nanoparticles. A classical spring model could be used to describe plasmon’s behavior.…
(more)
▼ Plasmon is considered to be the incompressible self-oscillation of conducting electrons in small nanoparticles. A classical spring model could be used to describe plasmon’s behavior. Many different techniques have been applied to understand nanostructure’s plasmonic properties. Electron energy loss spectroscopy (EELS) is one of these tools, which is helpful for us to understand the interaction between fast moving electrons and nanomaterials. It could achieve very high spatial and energy resolution. Here, we develop a new finite-difference time-domain method to calculate EELS spectra and maps, which is based on a commercial software package “Lumerical”. The calculated results for different cases are compared with the well-known boundary element method (BEM) and show an excellent agreement. Our finite-difference time-domain (
FDTD) method to calculate EELS spectra has further been proven really helpful by high-density plasmonic dimers’ experimental results.
There are basically two different numerical techniques. One is based on finite difference method (FEM) and another is according to finite-difference time-domain method (
FDTD). Both of them are very important to perform optical calculations in nanophotonics and plasmonics area. In general, they will try to solve Maxwell equations with many different boundary conditions numerically.
Optical properties of nanomaterials are also very tremendous for us to understand plasmonics behavior in the external electromagnetic fields. We systematically performed FEM simulations for different dimensions’ split ring structure and identified each plasmon mode via induced charge plot. Later we also studied hollow Au Nanoshells: hollow Au-Ag Nanoshell and hollow Au-Co Nanoshell. The former showed the surprising in vivo instability in the near infrared region while the later has potential application in hot electron generation.
Advisors/Committee Members: Nordlander, Peter J. (advisor), Geurts, Frank (committee member), Halas, Naomi (committee member).
Subjects/Keywords: EELS; FDTD; FEM; plasmonics; nanoshell
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cao, Y. (2015). Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/87717
Chicago Manual of Style (16th Edition):
Cao, Yang. “Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure.” 2015. Doctoral Dissertation, Rice University. Accessed February 27, 2021.
http://hdl.handle.net/1911/87717.
MLA Handbook (7th Edition):
Cao, Yang. “Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure.” 2015. Web. 27 Feb 2021.
Vancouver:
Cao Y. Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure. [Internet] [Doctoral dissertation]. Rice University; 2015. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1911/87717.
Council of Science Editors:
Cao Y. Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure. [Doctoral Dissertation]. Rice University; 2015. Available from: http://hdl.handle.net/1911/87717

Delft University of Technology
12.
Kong, F. (author).
Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method.
Degree: 2012, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:63a0d200-b44a-40c1-b0ef-35a3f0bcf34a
This thesis has studied how to modify the optical behaviors of the luminescent phosphors by introducing a 1D nanostructure.
Optics
Imaging Physics
Applied Sciences
Advisors/Committee Members: Urbach, H.P. (mentor), Boer, D.D. (mentor).
Subjects/Keywords: FDTD Simulation; Nano; Grating; Phosphor
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kong, F. (. (2012). Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:63a0d200-b44a-40c1-b0ef-35a3f0bcf34a
Chicago Manual of Style (16th Edition):
Kong, F (author). “Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method.” 2012. Masters Thesis, Delft University of Technology. Accessed February 27, 2021.
http://resolver.tudelft.nl/uuid:63a0d200-b44a-40c1-b0ef-35a3f0bcf34a.
MLA Handbook (7th Edition):
Kong, F (author). “Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method.” 2012. Web. 27 Feb 2021.
Vancouver:
Kong F(. Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Feb 27].
Available from: http://resolver.tudelft.nl/uuid:63a0d200-b44a-40c1-b0ef-35a3f0bcf34a.
Council of Science Editors:
Kong F(. Simulations of the Optical Behaviors of Nanostructured Phosphors Based on FDTD Method. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:63a0d200-b44a-40c1-b0ef-35a3f0bcf34a

University of Notre Dame
13.
John Emory McRaven.
Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>.
Degree: Electrical Engineering, 2005, University of Notre Dame
URL: https://curate.nd.edu/show/3j333199t75
► The goal of this thesis is to outline the significant issues affecting the performance of antenna-coupled metal-oxide-metal diodes for the detection of infrared radiation,…
(more)
▼ The goal of this thesis is to outline the
significant issues affecting the performance of antenna-coupled
metal-oxide-metal diodes for the detection of infrared radiation,
and to present techniques for the analysis and design of these
structures. Possible detection mechanisms in the metal-oxide-metal
junctions are presented, and their relative likelihood is
discussed. Fabricated junctions are also fitted to theoretical
tunneling models. Techniques for analyzing the effects of a
substrate on the performance of an antenna are described. The
Finite-Difference Time-Domain method for analyzing antenna
structures is also presented. Code was written based upon this
method, and its results are compared to existing infrared antennas
from other research groups.
Advisors/Committee Members: Dr. Patrick Fay, Committee Member, Dr. Gary Bernstein, Committee Member, Dr. Wolfgang Porod, Committee Chair.
Subjects/Keywords: FDTD MOM
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
McRaven, J. E. (2005). Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/3j333199t75
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):
McRaven, John Emory. “Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>.” 2005. Thesis, University of Notre Dame. Accessed February 27, 2021.
https://curate.nd.edu/show/3j333199t75.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McRaven, John Emory. “Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>.” 2005. Web. 27 Feb 2021.
Vancouver:
McRaven JE. Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>. [Internet] [Thesis]. University of Notre Dame; 2005. [cited 2021 Feb 27].
Available from: https://curate.nd.edu/show/3j333199t75.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McRaven JE. Theoretical Considerations for the Performance of
Antenna-Coupled Metal-Oxide-Metal Diodes</h1>. [Thesis]. University of Notre Dame; 2005. Available from: https://curate.nd.edu/show/3j333199t75
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New Mexico
14.
Hasan, I.M. Mehdi.
FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance.
Degree: Electrical and Computer Engineering, 2012, University of New Mexico
URL: http://hdl.handle.net/1928/20985
► The finite-difference time-domain (FDTD) technique is a very flexible and robust means to solve problems spanning a broad range of applications (defense, communication, computing, semiconductor…
(more)
▼ The finite-difference time-domain (
FDTD) technique is a very flexible and robust means to solve problems spanning a broad range of applications (defense, communication, computing, semiconductor devices and biomedicine), especially where geometrical complexities, nonlinearities and multiphysics dominate. In this thesis, novel photodetectors are developed via
FDTD having sub-wavelength active areas that yield enhanced optical absorption at near-infrared (NIR) wavelengths by way of plasmonics or photonic nanojets. The response time of photodiodes is primarily limited by two factors: (1) the transit time of photo-generated carriers to the electrode and (2) depletion layer capacitance of the semiconductor. The former requires a thinner depletion layer, resulting in a large depletion layer capacitance. To suppress the increase of the depletion layer capacitance, it is necessary to decrease the active area of the photodiode with depletion layer thickness. However, the smaller the active area the lower the output of the photodiode under the constant optical power density. To overcome the trade-off between speed and responsivity, the incident light should be efficiently confined within a small active area. Surface plasmons play an important role in this phenomenon as surface plasmons can enhance the near-field when excited by a certain wavelength. Resonant surface plasmons can confine strong optical near fields in a sub wavelength volume, this has been demonstrated for near- infrared dipole antennas. As an alternative to plasmonics it is proposed here that photonic nanojets may be employed to focus light onto the small active region of a photodetector. A photonic nanojet is a narrow, high-intensity electromagnetic beam that propagates into the background medium from the shadow side surface of a plane-wave illuminated loss-less dielectric micro-cylinder or micro-sphere of diameter greater than the illuminating wavelength, λ. The transverse beam width of the nanojet can be as small as λ/3 and length can be as long as 20λ, so we can use a photonic nanojet to concentrate the energy into a small region. By using the E-field enhancement in a sub-wavelength active area provided by the photonic nanojet and comparing it with the enhancement of the plasmonic structures, we may improve the responsivity and speed of the photodetector.
Advisors/Committee Members: Zarkesh-Ha, Payman, Simpson, Jamesina J., Graham, Edward D. Jr., Lester, Luke F., Simpson, Jamesina J., Zarkesh-Ha, Payman.
Subjects/Keywords: FDTD; Plasmonic; Photonic Nanojet
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hasan, I. M. M. (2012). FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance. (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/20985
Chicago Manual of Style (16th Edition):
Hasan, I M Mehdi. “FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance.” 2012. Masters Thesis, University of New Mexico. Accessed February 27, 2021.
http://hdl.handle.net/1928/20985.
MLA Handbook (7th Edition):
Hasan, I M Mehdi. “FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance.” 2012. Web. 27 Feb 2021.
Vancouver:
Hasan IMM. FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance. [Internet] [Masters thesis]. University of New Mexico; 2012. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1928/20985.
Council of Science Editors:
Hasan IMM. FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance. [Masters Thesis]. University of New Mexico; 2012. Available from: http://hdl.handle.net/1928/20985

University of Waterloo
15.
Matheson, Ryan.
An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics.
Degree: 2010, University of Waterloo
URL: http://hdl.handle.net/10012/5001
► This thesis investigates the issues in deriving the Finite Di erence Time Domain Method, including the derivation of a unique method for exciting an FDTD…
(more)
▼ This thesis investigates the issues in deriving the Finite Di erence Time Domain
Method, including the derivation of a unique method for exciting an FDTD system
that is physically realistic in terms of acoustics. It is also the goal of this thesis to use
the FDTD method as a tool for investigating various speaker placement con gurations
for use in bass equalization. A demerit function is then developed in order to assess
how well a particular equalization method performs relative to any others.
Subjects/Keywords: FDTD; Acoustics
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APA ·
Chicago ·
MLA ·
Vancouver ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Matheson, R. (2010). An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5001
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):
Matheson, Ryan. “An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics.” 2010. Thesis, University of Waterloo. Accessed February 27, 2021.
http://hdl.handle.net/10012/5001.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Matheson, Ryan. “An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics.” 2010. Web. 27 Feb 2021.
Vancouver:
Matheson R. An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics. [Internet] [Thesis]. University of Waterloo; 2010. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10012/5001.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Matheson R. An Investigation and Application of the Finite Difference Time Domain Method as a Tool for Solving Equalization Problems in Acoustics. [Thesis]. University of Waterloo; 2010. Available from: http://hdl.handle.net/10012/5001
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Macêdo, Jorge Andrey da Silva.
Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial.
Degree: Mestrado, Telecomunicações, 2008, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/
;
► Este trabalho apresenta um novo formalismo bi-dimensional em diferenças finitas no domínio do tempo (2D-FDTD) para a simulação de estruturas baseadas em metamateriais. A natureza…
(more)
▼ Este trabalho apresenta um novo formalismo bi-dimensional em diferenças finitas no domínio do tempo (2D-FDTD) para a simulação de estruturas baseadas em metamateriais. A natureza dispersiva destes meios é levada em consideração de forma precisa pela inclusão dos modelos materiais de Drude para os tensores permissividade elétrica e permeabilidade magnética. Todos os elementos dos tensores são considerados neste formalismo, o que o torna muito atraente para a modelagem de uma classe geral de estruturas eletromagnéticas. Dois efeitos de enorme impacto são analisados em detalhes, sendo eles a cobertura de invisibilidade e o rotacionamento de campo. Ambos os efeitos requerem a utilização de técnicas de transformação de coordenadas a qual deve ser aplicada apenas na região onde os campos eletromagnéticos precisam ser manipulados, tirando vantagem da invariância das equações de Maxwell quanto a estas operações. Esta técnica redefine localmente os parâmetros de permissividade e permeabilidade do meio transformado. O formalismo implementado apresentou grande estabilidade e precisão, uma conseqüência direta da natureza dispersiva dos modelos materiais de Drude, o que o caracteriza como uma boa contribuição para uma completa compreensão da fenomenologia por trás destes efeitos fascinantes. Os resultados numéricos apresentaram boa concordância com os disponíveis na literatura. Foi também observado que ambas estruturas são muito sensíveis a variações de freqüência do campo de excitação.
This work introduces an extended two-dimensional finite difference time domain method (2D-FDTD) for the simulation of metamaterial based structures. The dispersive nature of these media is accurately taken into account through the inclusion of the Drude material models for the permittivity and permeability tensors. All tensor elements are properly accounted for, making the formalism quite attractive for the modeling of a general class of electromagnetic structures. Two striking effects are investigated with the proposed model, namely, the invisibility cloaking and the field rotation effects. Both effects require the utilization of a coordinate transformation technique which must be applied only in the region where the electromagnetic field needs to be manipulated, taking advantage of the invariance of Maxwell\'s equations with respect to these operations. This technique locally redefines the permittivity and permeability parameters of the transformed media. The implemented formalism has proved to be quite stable and accurate, a direct consequence of the dispersive nature of the Drude material model, which characterizes it as a good contribution to fully understand the phenomenology behind these fascinating effects. The numerical results are in good agreement with those available in the literature. It was also verified that both structures are very sensitive to frequency variations of the excitation field.
Advisors/Committee Members: Borges, Ben Hur Viana.
Subjects/Keywords: Anisotropia; Anisotropy; Dispersive media; FDTD; FDTD; Meios dispersivos; Metamateriais; Metamaterials
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APA ·
Chicago ·
MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Macêdo, J. A. d. S. (2008). Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/ ;
Chicago Manual of Style (16th Edition):
Macêdo, Jorge Andrey da Silva. “Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial.” 2008. Masters Thesis, University of São Paulo. Accessed February 27, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/ ;.
MLA Handbook (7th Edition):
Macêdo, Jorge Andrey da Silva. “Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial.” 2008. Web. 27 Feb 2021.
Vancouver:
Macêdo JAdS. Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Feb 27].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/ ;.
Council of Science Editors:
Macêdo JAdS. Formalismo FDTD para a modelagem de meios dispersivos apresentando anisotropia biaxial. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/18/18155/tde-15102008-135510/ ;

Universitat Rovira i Virgili
17.
Bertó Roselló, Francisco.
Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing.
Degree: Departament d'Enginyeria Electrònica, Elèctrica i Automàtica, 2018, Universitat Rovira i Virgili
URL: http://hdl.handle.net/10803/665620
► Some materials shown particular physical, optical and chemical properties at the nanoscale. The nanotechnology permits to scientist enhance their properties modifying the matter structure at…
(more)
▼ Some materials shown particular physical, optical and chemical properties at the nanoscale. The nanotechnology permits to scientist enhance their properties modifying the matter structure at this level and take advantage of them for the development of new devices and applications. Particularly important is the research in biosensing in order to obtain more sensitive and reliable devices with a view for their deployment to society in the form of cost-effective and reliable diagnostic systems. The manufacturing of such devices in some cases implies the manipulation of the light in these materials at the nanoscale, for which it implies to have a deep knowledge of the optical behaviour of the structure. In this sense, the election of the appropriate material is decisive in the development of biosensing devices. Nanoporous anodic alumina (NAA) is a self-ordered porous material which their optical properties in the visible, their great tunability of the structure, their ability to act as a holder or scaffold of small objects and their stability under biological conditions make it especially appropriate as a platform for the development of optical biosensors. Theoretical studies on the NAA optical properties is a fundamental field of research. The numerical modelling of these properties permits to understand their relationship with the structural features of the NAA, providing a conceptual framework for the analysis of their optical behaviour. In this thesis, we have analyzed the suitability and developed several predictive models for the optical properties of the NAA valid in a wide range of geometrical characteristics. Subsequently our simulation model has been applied to study the suitability of two types of gold-coated NAA structures as a platform for reflectometric-based plasmonic biosensors. Finally, a theoretical study of the optical behaviour by means of numerical modelling of gradient-index NAA (NAA-GI) based structures has been performed.
Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Ferré-Borrull, Josep (director).
Subjects/Keywords: Alúmina nanoporosa; FDTD simulació; Nanoestructures; FDTD simulación; Nanoestructuras; Nanoporous alumina; FDTD simulation; Nanostructures; Ciències; 004; 535; 62; 621.3
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bertó Roselló, F. (2018). Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/665620
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):
Bertó Roselló, Francisco. “Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing.” 2018. Thesis, Universitat Rovira i Virgili. Accessed February 27, 2021.
http://hdl.handle.net/10803/665620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bertó Roselló, Francisco. “Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing.” 2018. Web. 27 Feb 2021.
Vancouver:
Bertó Roselló F. Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing. [Internet] [Thesis]. Universitat Rovira i Virgili; 2018. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10803/665620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bertó Roselló F. Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing. [Thesis]. Universitat Rovira i Virgili; 2018. Available from: http://hdl.handle.net/10803/665620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
18.
Li, Wei-hao.
Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method.
Degree: Master, Electrical Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0725115-100007
► Electromagnetic interference problems have become serious gradually because many devices are getting more sophisticated and sensitive in modern life. Designers often need to consider a…
(more)
▼ Electromagnetic interference problems have become serious gradually because many devices are getting more sophisticated and sensitive in modern life. Designers often need to consider a variety of situations complex problems so their demand for software also enhanced. Computation time of the frequency domain algorithm grows with the complexity of the problem, but the time domain algorithm is linear growth. Therefore, the efficiency of time domain algorithm will be greater than the frequency domain algorithm at highly complex issue. Itâs quite suitable to analyze electromagnetic interference of missiles using time domain algorithm.
Subgridding
FDTD method can enhance the efficiency of simulation by using different precision grid to describe any structure in the whole computational domain. Therefore, the stability and accuracy of the subgrid method are both popular topics for studies around the world. In this thesis, we proposed the adaptive time step method combined with non-uniform grid method to link boundary between main grid and local grid. One-timeâs surface coupling process doesnât need to lower time step, therefore, the stability and the computing speed can be improved effectively.
In the second part, we analyze electromagnetic interference of missileâs model using the method described above. The PCB structure is built by local grid, the remaining structures are built by main grid, two types of grid are defined by a scale of one to five. To simulate electromagnetic pulse, a Gaussian plane wave was passed through the missile model in different angle. To explain the feasibility of our approach, the result will be compared with HFSS at last.
Advisors/Committee Members: Ken-Huang Lin (chair), chen-chao Wang (chair), Lih-Tyng Hwang (chair), Chih-Wen Kuo (committee member).
Subjects/Keywords: Adaptive time step; FDTD; Electromagnetic Interference; Subgrid
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, W. (2015). Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0725115-100007
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, Wei-hao. “Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method.” 2015. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0725115-100007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Wei-hao. “Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method.” 2015. Web. 27 Feb 2021.
Vancouver:
Li W. Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0725115-100007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li W. Electromagnetic Interference of Signal Traces Inside a Missile Using the FDTD Subgridding Method. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0725115-100007
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
19.
Lin, Chih-Hsin.
A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method.
Degree: Master, Communications Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116116-115734
► When designers design products, they will avoid the distortion of signal as possible. However, they sometimes may make input signal propagate in unusual form. For…
(more)
▼ When designers design products, they will avoid the distortion of signal as possible. However, they sometimes may make input signal propagate in unusual form. For instance, military airplanes can be coated with special material on the body surface, and it cannot cause normal reflection and scattering when radiations touch on the body surface. Therefore, radars will not receive expected information to predict their movements. This special material is commonly known as invisible material, and anisotropic material is one of the choice of materials.
FDTD is widely used in analysis of electromagnetic wave. Since there are a few disadvantages on the analysis of anisotropic material with Yeeâs grid, Lebedev grid becomes famous because of its better results on the same issue. However, except the advantages, Lebedev grid may face a lot of trouble, such as bigger numerical distortion and complicated excitation.
As a result, this thesis will provide a method which combines two kinds of grid that have been mentioned above to have both of their advantages and achieve higher accuracy and efficiency. Therefore, the issue of anisotropic material can be solved more efficiently and accurately.
Advisors/Committee Members: Yu-De Lin (chair), Chih-Wen Kuo (committee member), Ruey-Bing Hwang (chair), Ken-Huang Lin (chair).
Subjects/Keywords: FDTD; Lebedev grid; anisotropic; Electromagnetic Interference
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lin, C. (2016). A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116116-115734
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, Chih-Hsin. “A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method.” 2016. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116116-115734.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lin, Chih-Hsin. “A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method.” 2016. Web. 27 Feb 2021.
Vancouver:
Lin C. A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116116-115734.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lin C. A Method of Combination of Yee Grid and Lebedev Grid to Analysis Anisotropic Materials with FDTD Method. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116116-115734
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology
20.
Kawamura, Daiji.
Investigating block mask lithography variation using finite-difference time-domain simulation.
Degree: Microelectronic Engineering, 2011, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/5538
► Simulation work has long been realized as a method for analyzing semiconductor processing expediently and cost-effectively. As technology advancements strive to meet increasingly stringent parameter…
(more)
▼ Simulation work has long been realized as a method for analyzing semiconductor processing expediently and cost-effectively. As technology advancements strive to meet increasingly stringent parameter constraints, difficult issues arise. In this paper, challenges in block mask lithography will be discussed with the aid of using simulation packages developed by Panoramic Technology®. Halo formation utilizes a 20-30° tilt-angle implantation [1]. The block mask defines the geometries of the resist opening to allow implantation of atoms to extend into the channel region. Due to designed resolution scaling and tolerance in conjunction with substrate topography, there can be undesired influence on the electrical device characteristics due to block variations. Although the block mask pattern definition is relatively simple, additional investigation is required to understand the sensitivities that drive the implant resist CD variation.
In this study, block mask measurements processed using 248 nm and 193 nm illumination sources were used to calibrate the simulation work. Addition of optical proximity correction (OPC) and wafer topography geometry parameters have been shown to improve modeling capabilities. The modeling work was also able to show the benefits of a developable bottom anti-reflection coating (dBARC) process over a single layer resist (SLR) process in the resist intensity profiles as gate pitch is decreased. The goal of this work was to develop an accurate simulation model that characterizes the lithographic performance needed to support the transition into future technology nodes.
Advisors/Committee Members: Hirschman, Karl.
Subjects/Keywords: Block; FDTD; Kawamura; Lithography; Panoramic; Simulation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kawamura, D. (2011). Investigating block mask lithography variation using finite-difference time-domain simulation. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/5538
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):
Kawamura, Daiji. “Investigating block mask lithography variation using finite-difference time-domain simulation.” 2011. Thesis, Rochester Institute of Technology. Accessed February 27, 2021.
https://scholarworks.rit.edu/theses/5538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kawamura, Daiji. “Investigating block mask lithography variation using finite-difference time-domain simulation.” 2011. Web. 27 Feb 2021.
Vancouver:
Kawamura D. Investigating block mask lithography variation using finite-difference time-domain simulation. [Internet] [Thesis]. Rochester Institute of Technology; 2011. [cited 2021 Feb 27].
Available from: https://scholarworks.rit.edu/theses/5538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kawamura D. Investigating block mask lithography variation using finite-difference time-domain simulation. [Thesis]. Rochester Institute of Technology; 2011. Available from: https://scholarworks.rit.edu/theses/5538
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
21.
Cao, Zhipeng.
Advances In Simulation And Thermography For
high Field Mri.
Degree: 2013, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/18817
► High field MRI systems can benefit from increased signal-to-noise ratio (SNR) but face challenges of decreased homogeneity in signal intensity across images and increased patient…
(more)
▼ High field MRI systems can benefit from increased signal-to-noise ratio (SNR) but face
challenges of decreased homogeneity in signal intensity across images and increased patient
heating. Currently, engineering studies for high field MRI involve modeling of human subjects
and RF coils and calculating the MR relevant electromagnetic fields, as well as collecting
experimental MR data to validate the simulation prediction. Presented here is a computer-based
MRI system simulator developed to solve the Bloch equation with consideration of accurate
electromagnetic fields calculated with finite-difference-time-domain (
FDTD) method. It is
demonstrated that the MRI system simulator can simulate many realistic MR phenomena. It
bridges the gap between field simulation and experimental MR imaging, and can potentially
facilitate the validation of new ideas by MR researchers. By utilizing the system simulator and an
FDTD solver, an analysis of high field MRI performance at up to 14 Tesla with current standard
transmission and reception methods has been performed. It is found that for imaging of the
human head, depending on the imaging sequence used high field MRI could have more-than-linear increase in SNR and less-than-quadratic increase in energy dissipation in the
subject.
Finally, in order to explore the possibility of patient-specific temperature monitoring to ensure
safety due to increased power deposition at high field, a novel compressed sensing reconstruction
technique is presented to improve the acquisition speed of proton resonance frequency shift
thermography.
Advisors/Committee Members: Qing X Yang, Dissertation Advisor/Co-Advisor, Qing X Yang, Committee Chair/Co-Chair, Jesse Louis Barlow, Committee Member, Thomas Neuberger, Committee Member, William Joseph Weiss, Committee Member, Christopher Collins, Special Member, Mark Griswold, Special Member.
Subjects/Keywords: MRI; FDTD; Simulation; Hyperthermia; Reconstruction; Compressed Sensing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cao, Z. (2013). Advances In Simulation And Thermography For
high Field Mri. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18817
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):
Cao, Zhipeng. “Advances In Simulation And Thermography For
high Field Mri.” 2013. Thesis, Penn State University. Accessed February 27, 2021.
https://submit-etda.libraries.psu.edu/catalog/18817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cao, Zhipeng. “Advances In Simulation And Thermography For
high Field Mri.” 2013. Web. 27 Feb 2021.
Vancouver:
Cao Z. Advances In Simulation And Thermography For
high Field Mri. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Feb 27].
Available from: https://submit-etda.libraries.psu.edu/catalog/18817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cao Z. Advances In Simulation And Thermography For
high Field Mri. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18817
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
22.
Abdallah, Samer S.
Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors.
Degree: 2007, University of Waterloo
URL: http://hdl.handle.net/10012/3373
► Recently, a novel optical imaging technique was successfully used in measuring the functional response of living retinal tissues. The technique, functional ultra high resolution optical…
(more)
▼ Recently, a novel optical imaging technique was successfully used in measuring the functional
response of living retinal tissues. The technique, functional ultra high resolution
optical coherence tomography, measures localized differential changes in the retina reflectivity
over time resulting from external white light stimulation. This result can be used to
develop a non-invasive diagnostic method for the early detection of retinal diseases. However,
the physiological causes of the experimentally observed optical signals, most of which
originate from the photoreceptors layer, are still not well understood. Due to the complexity
of the photoreceptors, using purely experimental methods to isolate the changes in
light reflectivity corresponding to individual physiological processes is not feasible. Therefore,
we have employed the finite-difference time-domain method to model the changes in
light scattering patterns of the photoreceptor cells caused by light-induced physiological
processes. Processes such as cell swelling, cell elongation and hyperpolarization of doublelipid
membrane structures were simulated by changing the size parameters and optical
properties of the cells components. Simulation results show that the hyperpolarization of
double-lipid membranous structures and cell swelling are the most likely causes for the
experimentally observed changes in optical reflectivity. A number of experiments were
suggested to verify the conclusions drawn from this numerical work. This numerical work
includes an analysis of various errors in FDTD computational models.
Subjects/Keywords: Photoreceptors; Scattering; FDTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Abdallah, S. S. (2007). Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/3373
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):
Abdallah, Samer S. “Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors.” 2007. Thesis, University of Waterloo. Accessed February 27, 2021.
http://hdl.handle.net/10012/3373.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abdallah, Samer S. “Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors.” 2007. Web. 27 Feb 2021.
Vancouver:
Abdallah SS. Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors. [Internet] [Thesis]. University of Waterloo; 2007. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10012/3373.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abdallah SS. Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors. [Thesis]. University of Waterloo; 2007. Available from: http://hdl.handle.net/10012/3373
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Washington State University
23.
[No author].
The Study of RF Burns and AMI Exposure Using the FDTD Method
.
Degree: 2012, Washington State University
URL: http://hdl.handle.net/2376/4151
► One of my research topic is about the human body exposure to AMI. Power utilities are increasingly deploying residential meters that communicate wirelessly. These meters…
(more)
▼ One of my research topic is about the human body exposure to AMI. Power utilities are increasingly deploying residential meters that communicate wirelessly. These meters may employ multiple antennas and radiate at different frequencies, ranging from 850 MHz to 2.4 GHz. Unlike radiofrequency (RF) exposure caused by cell phones, where the position of the phone relative to the body is somewhat fixed, the position of a power meter relative to the body is rather unconstrained. In this work we use the finite-difference time-domain (FDTD) method to study the specific absorption rate (SAR) produced in full anatomical models of humans when they are exposed to the RF fields produced by a wireless AMI meter. When one accounts for the meter's true duty cycle or there is a realistic separation between the meter and an individual, all SAR values fall within safety limits.
Another topic of my research is about the RF burns. Both the International Commission on Non-Ionizing Radiation Protection (ICNIRP) and the Institute of Electrical and Electronics Engineers (IEEE) have maximum permissible exposure (MPE) guidelines that specify the limits on the magnitude of the electromagnetic (EM) fields and contact currents to which humans are allowed to be exposed. However, even when the fields do not exceed the ICNIRP or IEEE limits, a radio frequency (RF) burn may occur when a person is in contact with a perfect electric conductor (PEC). In this work we use the FDTD method and a full anatomical model to calculate the contact current density when a person is in contact with a PEC rod that is on order of 2 m in length. The effects of rod length, rod diameter, and the type of touch are considered. Frequencies are between 10 MHz and 600 MHz.
A SubGridding technique in FDTD field was investigated as a topic in my thesis. The fundamental FDTD method is not well suited to model problems in which the structure of interest has important geometric features at greatly different scales. In order to study such "multiscale" problems, numerous modified FDTD algorithms have been proposed that incorporate a subgridding technique. In 2006, Berenger proposed a promising new technique known as the Huygens subgridding (HSG) method. However, this technique suffers from a late-time instabilities. In this work, we demonstrate how the judicious use of artificial loss can be used to control this instability. We also explore other aspects of the HSG method, such as the reflection coefficient, for various discretizations.
Subjects/Keywords: Electromagnetics;
FDTD;
RF Burn;
SAR;
Smart Meter
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Chicago ·
MLA ·
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APA (6th Edition):
author], [. (2012). The Study of RF Burns and AMI Exposure Using the FDTD Method
. (Thesis). Washington State University. Retrieved from http://hdl.handle.net/2376/4151
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):
author], [No. “The Study of RF Burns and AMI Exposure Using the FDTD Method
.” 2012. Thesis, Washington State University. Accessed February 27, 2021.
http://hdl.handle.net/2376/4151.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
author], [No. “The Study of RF Burns and AMI Exposure Using the FDTD Method
.” 2012. Web. 27 Feb 2021.
Vancouver:
author] [. The Study of RF Burns and AMI Exposure Using the FDTD Method
. [Internet] [Thesis]. Washington State University; 2012. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/2376/4151.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
author] [. The Study of RF Burns and AMI Exposure Using the FDTD Method
. [Thesis]. Washington State University; 2012. Available from: http://hdl.handle.net/2376/4151
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
Muller, Jérôme.
Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation.
Degree: Docteur es, Mécanique et énergétique, 2011, Université Henri Poincaré – Nancy I
URL: http://www.theses.fr/2011NAN10082
► De récentes études ont montré que les ondes électromagnétiques, proche d'une structure diffusante telle qu'une pointe de microscope à force atomique (AFM), peuvent être diffusées…
(more)
▼ De récentes études ont montré que les ondes électromagnétiques, proche d'une structure diffusante telle qu'une pointe de microscope à force atomique (AFM), peuvent être diffusées et détectées en champ lointain. Ainsi, la détection d'ondes de surface par microscopie optique en champ proche (SNOM) est une technique prometteuse dans le cadre des mesures thermiques aux petites échelles. Une telle technologie prend alors le nom de microscope TRSTM (Thermal Radiation Scanning Tunnelling Microscopy).Le travail de thèse présenté dans ce manuscrit se scinde en deux étapes. La première a trait à nos travaux expérimentaux basés sur le montage d'un dispositif TRSTM. Nous en décrivons les différentes composantes, ainsi que les difficultés rencontrées liées à son fonctionnement. En outre, divers outils numériques, destinés à détecter et extraire tout signal périodique utile, sont développés. La seconde étape se concentre sur nos travaux numériques. Nous y proposons un modèle de diffusion d'ondes électromagnétiques basé sur la FDTD (Finite-Difference Time-Domain) et la transformation champ proche/champ lointain. Ce modèle a été validé par l'étude de dipôles, puis de sphères dispersives à proximité d'un substrat diélectrique. Alors, un certain nombre de simulations de diffusion d'ondes évanescentes par une pointe, de diverses formes et de divers matériaux, proche d'une interface, est présenté.
Recent studies have shown that electromagnetic waves (in particular the thermal radiation), in the vicinity of a scattering object such as en atomic force microscope (AFM), can be scattered from near to far-field and thus detected. The detection of surface waves through scanning near-field optical microscopy (SNOM) is a promising technique for thermal measurement at small scales. Such technology is known as TRSTM. The thesis work presented in this manuscript is divided into tow part. The first one relates to our experimental work based on the development of a TRSTM device. Its various components are detailed, and the difficulties observed during its utilization are described. Furthermore, several digital tools, used to detect and extract any useful signal, are presented. The second part of our work focuses on the development of a numerical model based on the finite-difference time-domain (FDTD) and the near-field to far-field (NFTFF) transformation for the scattering of electromagnetic waves. This model has been validated by studying different cases of dipoles and dispersive spheres close to a dielectric substrate. Then, several simulations of scattering of evanescent waves by a tip, with various shapes and materials, near an interface, are presented.
Advisors/Committee Members: Lacroix, David (thesis director), Parent, Gilles (thesis director).
Subjects/Keywords: Fdtd; Trstm; Snom; Rayonnement thermique; 502.82
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Muller, J. (2011). Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation. (Doctoral Dissertation). Université Henri Poincaré – Nancy I. Retrieved from http://www.theses.fr/2011NAN10082
Chicago Manual of Style (16th Edition):
Muller, Jérôme. “Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation.” 2011. Doctoral Dissertation, Université Henri Poincaré – Nancy I. Accessed February 27, 2021.
http://www.theses.fr/2011NAN10082.
MLA Handbook (7th Edition):
Muller, Jérôme. “Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation.” 2011. Web. 27 Feb 2021.
Vancouver:
Muller J. Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation. [Internet] [Doctoral dissertation]. Université Henri Poincaré – Nancy I; 2011. [cited 2021 Feb 27].
Available from: http://www.theses.fr/2011NAN10082.
Council of Science Editors:
Muller J. Réalisation et modélisation d'un microscope à sonde locale appliqué à l'étude du rayonnement thermique en champ proche : Realization and modeling of a scanning probe microscope applied to the study of thermal near-field radiation. [Doctoral Dissertation]. Université Henri Poincaré – Nancy I; 2011. Available from: http://www.theses.fr/2011NAN10082

Syracuse University
25.
Aydin, Gokhan.
A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations.
Degree: PhD, Electrical Engineering and Computer Science, 2011, Syracuse University
URL: https://surface.syr.edu/eecs_etd/298
► In this dissertation, a set of general purpose single-field finite-difference time-domain updating equations for solving electromagnetic problems is derived. The formulation uses a single-field…
(more)
▼ In this dissertation, a set of general purpose single-field finite-difference time-domain updating equations for solving electromagnetic problems is derived. The formulation uses a single-field expression for full-wave solution. This formulation can provide numerical results similar to those obtained using the traditional formulation with less required computer resources.
Traditional finite-difference time-domain updating equations are based on Maxwell's curl equations whereas the single-field updating equations used here are based on the vector wave equation. General formulations are derived for normal and oblique incidence plane wave cases for linear, isotropic, homogeneous and non-dispersive as well as dispersive media.
To compare the single-field updating equations with the traditional ones, two-dimensional transverse magnetic, two-dimensional transverse electric and one-dimensional electromagnetic problems are solved. Fields generated by a current sheet and a filament electric current are calculated for one and two-dimensional formulations, respectively. Performance analyses of the single-field formulation in terms of CPU time, memory requirement, stability, dispersion, and accuracy are presented. Based on the simulations of several two-dimensional problems excited by a filament of electric current, it was observed that the single-field method is more efficient than the traditional one in terms of speed and memory requirements.
One scattering problem consisting of three infinitely long dielectric cylinders excited by an obliquely incident plane wave and another scattering problem consisting of a point source exciting a dispersive sphere, utilizing Lorentz-Drude model, are also formulated and analyzed. The numerical results obtained confirmed the validity and efficiency of the single-field formulations.
Advisors/Committee Members: Atef Z. Elsherbeni, Jay K. Lee.
Subjects/Keywords: FDTD; Single-Field; Vector wave equation; Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aydin, G. (2011). A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations. (Doctoral Dissertation). Syracuse University. Retrieved from https://surface.syr.edu/eecs_etd/298
Chicago Manual of Style (16th Edition):
Aydin, Gokhan. “A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations.” 2011. Doctoral Dissertation, Syracuse University. Accessed February 27, 2021.
https://surface.syr.edu/eecs_etd/298.
MLA Handbook (7th Edition):
Aydin, Gokhan. “A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations.” 2011. Web. 27 Feb 2021.
Vancouver:
Aydin G. A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations. [Internet] [Doctoral dissertation]. Syracuse University; 2011. [cited 2021 Feb 27].
Available from: https://surface.syr.edu/eecs_etd/298.
Council of Science Editors:
Aydin G. A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations. [Doctoral Dissertation]. Syracuse University; 2011. Available from: https://surface.syr.edu/eecs_etd/298

University of Toronto
26.
Vairavanathan, Vinujanan.
FDTD Characterization of Antenna-channel Interactions via Macromodeling.
Degree: 2010, University of Toronto
URL: http://hdl.handle.net/1807/24644
► Modeling of radio wave propagation is indispensable for the design and analysis of wireless communication systems. The use of the Finite-Difference Time-Domain (FDTD) method for…
(more)
▼ Modeling of radio wave propagation is indispensable for the design and analysis of wireless communication systems. The use of the Finite-Difference Time-Domain (FDTD) method for wireless channel modeling has gained significant popularity due its ability to extract wideband responses from a single simulation. FDTD-based techniques, despite providing accurate channel characterizations, have often employed point sources in their studies, mainly due to the large amounts of resources required for modeling fine geometrical details or features inherent in antennas into a discrete spatial domain. The underlying influences of the antenna on wave propagation have thus been disregarded. This work presents a possible approach for the efficient space-time analysis of antennas by deducing FDTD-compatible macromodels that completely encapsulate the electromagnetic behaviour of antennas and then incorporating them into a standard FDTD formulation for modeling their interactions with a general environment.
MAST
Advisors/Committee Members: Sarris, Costas D., Electrical and Computer Engineering.
Subjects/Keywords: Electromagnetics; FDTD method; Antenna macromodels; Reciprocity theorem
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Vairavanathan, V. (2010). FDTD Characterization of Antenna-channel Interactions via Macromodeling. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/24644
Chicago Manual of Style (16th Edition):
Vairavanathan, Vinujanan. “FDTD Characterization of Antenna-channel Interactions via Macromodeling.” 2010. Masters Thesis, University of Toronto. Accessed February 27, 2021.
http://hdl.handle.net/1807/24644.
MLA Handbook (7th Edition):
Vairavanathan, Vinujanan. “FDTD Characterization of Antenna-channel Interactions via Macromodeling.” 2010. Web. 27 Feb 2021.
Vancouver:
Vairavanathan V. FDTD Characterization of Antenna-channel Interactions via Macromodeling. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1807/24644.
Council of Science Editors:
Vairavanathan V. FDTD Characterization of Antenna-channel Interactions via Macromodeling. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/24644

Boston College
27.
Kong, Jiantao.
Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering.
Degree: PhD, Physics, 2018, Boston College
URL: http://dlib.bc.edu/islandora/object/bc-ir:108243
► Nonlocal effects, the wavenumber dependence in a medium's response to external disturbance, is treated in this thesis. Numerical computation methods to include nonlocal effects in…
(more)
▼ Nonlocal effects, the wavenumber dependence in a
medium's response to external disturbance, is treated in this
thesis. Numerical computation methods to include nonlocal effects
in plasmonic nanostructures’ electromagnetic response are
discussed, and applications of plasmonics to a few other fields are
elaborated. First, a computation scheme is proposed to extend
conventional finite-difference time-domain (
FDTD) methods to
nonlocal domain. An effective film whose response is derived from
Feibelman's d-function formalism is to replace the highly
non-uniform metal surfaces in simulations. It successfully produces
numerical results of plasmonic resonance shift and field
enhancement which agrees with the experimental data to first order.
This scheme is still classical, thus very fast compared to the
other first principle quantum methods such as density functional
theory. Then electron's scattering rate in an effective medium with
plasmonic nanostructures embedded-in, in random phase
approximation, is developed, with the wavenumber dependence in the
medium’s response accounted. Utilizing this calculation scheme of
electron’s scattering rate, further specific applications are
following. We show by simulation of the plasmonic nanostructures
and calculation of the electron scattering rates that hot-electron
plasmon-protection (HELPP) effects can protect the extra energy of
hot electrons from being dissipated as heat. This can be a
prototype of the 3rd generation solar cells. In another
application, we investigate the electron polar-optical-phonon (POP)
scattering in heavily-doped semiconductors when plasmonic
nanostructures are embedded-in. We show that electron-POP
scattering can be significantly suppressed compared to that of bulk
semiconductors. In the third application, we propose the plasmonic
multiple exciton generation (PMEG) scheme, with simulations and
calculations, showing that the efficiency of multiple exciton
generation in conventional semiconductors could be enhanced
significantly with proper designed plasmonic nanostructures
embedded-in or attached-adjacent.
Advisors/Committee Members: Krzysztof Kempa (Thesis advisor).
Subjects/Keywords: Electron Scattering; FDTD; Nanostructures; Nonlocal Effects; Plasmonics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kong, J. (2018). Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:108243
Chicago Manual of Style (16th Edition):
Kong, Jiantao. “Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering.” 2018. Doctoral Dissertation, Boston College. Accessed February 27, 2021.
http://dlib.bc.edu/islandora/object/bc-ir:108243.
MLA Handbook (7th Edition):
Kong, Jiantao. “Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering.” 2018. Web. 27 Feb 2021.
Vancouver:
Kong J. Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering. [Internet] [Doctoral dissertation]. Boston College; 2018. [cited 2021 Feb 27].
Available from: http://dlib.bc.edu/islandora/object/bc-ir:108243.
Council of Science Editors:
Kong J. Nonlocal Effects in Plasmonic Nanostructures’ Optical
Response and Electron Scattering. [Doctoral Dissertation]. Boston College; 2018. Available from: http://dlib.bc.edu/islandora/object/bc-ir:108243

Portland State University
28.
Higgins, James Alexander.
Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications.
Degree: MS(M.S.) in Electrical and Computer Engineering, Electrical and Computer Engineering, 2012, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/867
► The THz region is a burgeoning field of research with applications in spectroscopy, integrated circuit fabrication, bio-medicine, and communications. Until recently, the THz region…
(more)
▼ The THz region is a burgeoning field of research with applications in spectroscopy, integrated circuit fabrication, bio-medicine, and communications. Until recently, the THz region was largely unexplored, mainly due to the technical difficulties involved in making efficient and compact sources and detectors. As these challenges are addressed, the focus of research has shifted to practical applications, such as sensing and imaging. The focus of this thesis is to investigate the characterization of parallel plate waveguide multimode propagation and periodically notched resonant structures for use in sensing and material parameter extraction applications. Broadband and narrowband measurements are presented and analyzed. Measurements are compared to finite difference time domain simulations and analytic solutions that use a Fourier transform mode-matching technique. Agreement is observed between simulation and measurement of radiation patterns. Weighted estimates of individual mode analytic solutions produce equivalent radiation patterns, which allows insight into the energy coupled into each respective mode. Results show that higher order modes contribute both a greater conductive attenuation and higher coupling loss. Agreement is also observed between measurements and simulated single and periodically notched resonant structures. Results demonstrate shifting of the resonant peak with respect to changes in plate separation for the periodically notched structure. For the single notch resonator, simulations indicate the resonant peak is dependent on notch depth until the depth-to-width ratio is greater than two. This work demonstrates that multimode propagation can be identified and the amount of energy coupled into each mode may be estimated using radiation patterns. Experiments using quasi-optical time domain spectroscopic and continuous wave vector network analyzer systems in the THz region have been demonstrated. Finite difference time domain simulations have validated measurements on both systems. The results presented will advance the field of THz research by aiding in the design and analysis of sensing and material parameter extraction systems
Advisors/Committee Members: Branimir Pejcinovic.
Subjects/Keywords: Electromagnetism; FDTD Simulation; Multimode parallel plate waveguide
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Higgins, J. A. (2012). Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/867
Chicago Manual of Style (16th Edition):
Higgins, James Alexander. “Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications.” 2012. Masters Thesis, Portland State University. Accessed February 27, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/867.
MLA Handbook (7th Edition):
Higgins, James Alexander. “Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications.” 2012. Web. 27 Feb 2021.
Vancouver:
Higgins JA. Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications. [Internet] [Masters thesis]. Portland State University; 2012. [cited 2021 Feb 27].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/867.
Council of Science Editors:
Higgins JA. Measurement and Simulation of Parallel Plate Waveguide Structures in the Terahertz Region for Sensing and Material Characterization Applications. [Masters Thesis]. Portland State University; 2012. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/867

University of Toronto
29.
Kogon, Aaron J.
Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method.
Degree: 2020, University of Toronto
URL: http://hdl.handle.net/1807/103134
► Infinitely-periodic geometries are efficiently modelled in the finite-difference time-domain (FDTD) method using periodic boundary conditions (PBCs). Several PBC implementations operate by maintaining a constant wave…
(more)
▼ Infinitely-periodic geometries are efficiently modelled in the finite-difference time-domain (FDTD) method using periodic boundary conditions (PBCs). Several PBC implementations operate by maintaining a constant wave vector component in the periodic directions. This work presents the underlying mathematical background for all these methods and demonstrates their usage. However, infinitely-periodic structures modelled by PBCs are unrealizable physically. Therefore, an efficient FDTD technique for determining electromagnetic fields interacting with finite-sized periodic structures is proposed. The technique combines periodic boundary conditions—modelling fields away from the edges of the structure—with independent simulations of fields near the edges of the structure. It is shown that this algorithm efficiently determines the size of a periodic structure necessary for fields to converge to the infinitely-periodic case. Numerical validations of the technique illustrate the savings concomitant with the algorithm.
M.A.S.
Advisors/Committee Members: Sarris, Costas D, Electrical and Computer Engineering.
Subjects/Keywords: Edge effects; FDTD; Finite periodic structures; 0607
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kogon, A. J. (2020). Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/103134
Chicago Manual of Style (16th Edition):
Kogon, Aaron J. “Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method.” 2020. Masters Thesis, University of Toronto. Accessed February 27, 2021.
http://hdl.handle.net/1807/103134.
MLA Handbook (7th Edition):
Kogon, Aaron J. “Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method.” 2020. Web. 27 Feb 2021.
Vancouver:
Kogon AJ. Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method. [Internet] [Masters thesis]. University of Toronto; 2020. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1807/103134.
Council of Science Editors:
Kogon AJ. Efficient Simulation of Driven Finite Periodic Structures using the Finite-difference Time-domain Method. [Masters Thesis]. University of Toronto; 2020. Available from: http://hdl.handle.net/1807/103134

University of Manchester
30.
Hu, Runze.
UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY.
Degree: 2020, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:326058
► In computational electromagnetics (EM), the accuracy of the numerical simulation is compromised by randomness which may arise in various forms such as electric parameters and…
(more)
▼ In computational electromagnetics (EM), the
accuracy of the numerical simulation is compromised by randomness
which may arise in various forms such as electric parameters and
input sources. Though EM problems are usually treated as
deterministic, there exist many instances where some input
parameters of EM simulators cannot be strictly determined due to
limited knowledge regarding these parameters. The ambiguity of
input parameters causes a degree of uncertainty in the responses of
the system. In order to gain an understanding of the reliability of
numerical simulations, the possible uncertainty together with the
system response can be investigated. This thesis aims at
quantifying the uncertainty of the finite-difference time-domain
(
FDTD) simulation induced by the uncertainty of input parameters,
which is known as forward uncertainty quantification (UQ) or the
uncertainty propagation problem. The Monte Carlo method (MCM) is
the traditional technique utilised in UQ, yet it requires a
considerable number of
FDTD simulations, leading to excessive
computational resources. In order to reduce the computational cost
of UQ for the
FDTD simulation, a series of UQ techniques, such as
the stochastic collocation method and the non-intrusive polynomial
chaos (NIPC) expansion method, have been investigated. In
comparison to other UQ techniques, the NIPC method demonstrates
high accuracy and computational efficiency. However, this method
suffers from the curse of dimensionality whereby the number of
required
FDTD simulations grows substantially when the number of
uncertain parameters increases. To lift the curse of
dimensionality, the sparse schemes including the hyperbolic scheme
and the least angle regression (LARS) method were also studied.
Furthermore, this thesis investigated machine learning techniques
for UQ. An artificial neural network based UQ method was proposed
to quantify the uncertainty of the
FDTD response. This method
builds a surrogate model for the 11
FDTD simulation, and thus
bypassing the thousands of system-runs required in the MCM. The
proposed method has the potential to significantly reduce the
computational cost of UQ, which could be of significant use within
the bioelectromagnetics field.
Advisors/Committee Members: ALSUSA, EMAD EA, Costen, Fumie, Alsusa, Emad.
Subjects/Keywords: Finite-difference Time-domain (FDTD); Uncertainty quantification
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hu, R. (2020). UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:326058
Chicago Manual of Style (16th Edition):
Hu, Runze. “UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY.” 2020. Doctoral Dissertation, University of Manchester. Accessed February 27, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:326058.
MLA Handbook (7th Edition):
Hu, Runze. “UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY.” 2020. Web. 27 Feb 2021.
Vancouver:
Hu R. UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY. [Internet] [Doctoral dissertation]. University of Manchester; 2020. [cited 2021 Feb 27].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:326058.
Council of Science Editors:
Hu R. UNCERTAINTY QUANTIFICATION FOR FD-FDTD COMPUTATIONS FOR
THE HUMAN BODY. [Doctoral Dissertation]. University of Manchester; 2020. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:326058
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