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Efficient Band Diagram Computation for Periodic Structures Using Multiple Scattering Theory and Broadband Green's Function (MST-BBGF)
Efficient Band Diagram Computation for Periodic Structures Using Multiple Scattering Theor...
Efficient Band Diagram Computation for Periodic Structures Using Multiple Scattering Theory and Broadband Green's Function (MST-BBGF)

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105242
ISBN  
9798291569382
DDC  
621.3
저자명  
Gao, Ruoxing.
서명/저자  
Efficient Band Diagram Computation for Periodic Structures Using Multiple Scattering Theory and Broadband Greens Function (MST-BBGF)
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
119 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Tsang, Leung.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약This dissertation presents a high-efficiency computational framework for analyzing electromagnetic band diagrams in three-dimensional (3D) periodic photonic crystals. Photonic crystals-artificial structures with periodic dielectric modulation-have enabled novel control over the propagation of electromagnetic waves. Their ability to support photonic band gaps has led to widespread applications in optical communications, quantum photonics, and topological insulator design. However, computing band structures for complex 3D geometries remains a major challenge. Traditional methods such as plane wave expansion (PWE), finite element method (FEM), and finite difference time domain (FDTD) suffer from significant computational bottlenecks, particularly when applied to high-index contrast materials, irregular scatterers, or dense periodic arrays.To address these limitations, this work introduces an advanced approach that combines Multiple Scattering Theory (MST) with the Broadband Green's Function (BBGF) technique. The MST-BBGF method decomposes the global field problem into local scatterer interactions, using vector spherical harmonics and Foldy-Lax equations to formulate a compact Korringa-Kohn-Rostoker (KKR) eigenvalue problem. The BBGF technique accelerates the computation of periodic Green's functions via imaginary wavenumber deformation, allowing for fast and accurate broadband evaluations. Together, these techniques form a highly scalable and efficient solver that circumvents the need for full-domain volumetric meshing.A key innovation in this dissertation is the introduction of a general T-matrix extraction method that enables modular modeling of arbitrarily shaped scatterers. Unlike traditional methods that rely on analytic forms (e.g., Mie theory) or volume integration, this work proposes the use of far-field scattering amplitudes-obtained through full-wave numerical solvers such as FEKO or HFSS-to extract a single-scatterer T-matrix. Once computed, this T-matrix can be reused across all unit cells, regardless of the periodic configuration, substantially improving computational efficiency and enabling rapid parametric sweeps across geometries and frequencies. The developed MST-BBGF framework is rigorously validated through both analytical and numerical benchmarks. Comparisons against FEM simulations demonstrate that the proposed method achieves results with excellent agreement, while reducing simulation time and memory requirements by two to three orders of magnitude. Analytical validation using spherical dielectric scatterers confirms that the computed band diagrams match theoretical predictions to within negligible errors. Furthermore, the framework supports the flexible modeling of both sparse and dense periodic lattices, accommodating structures with strong near-field coupling and high-order multipole interactions.To demonstrate the full capability of the method, the dissertation applies the MST-BBGF solver to several complex and practically relevant structures. These include periodic arrays of two-layer triangular prism scatterers and core-shell resonators, where the T-matrix must account for multiple internal layers and asymmetry. The method is shown to capture subtle band shifts caused by high-order scattering, and accurately predict the emergence of complete band gaps. In the context of topological photonics, the framework is applied to systems exhibiting band inversion and edge state formation, highlighting its robustness in handling symmetry-breaking configurations.Overall, this dissertation offers a powerful and generalizable computational tool for 3D photonic crystal analysis. The MST-BBGF method combines physics-based modeling, mathematical efficiency, and numerical versatility, making it well suited for current and next-generation photonic design. Its modular structure and rapid convergence make it particularly valuable in the context of design optimization, inverse photonic design, and machine-learning-assisted material discovery. The method opens new possibilities for analyzing photonic crystals, topological insulators, metamaterials, and other periodic electromagnetic systems that were previously out of reach due to computational limitations.
일반주제명  
Electrical engineering
일반주제명  
Computer engineering
일반주제명  
Materials science
일반주제명  
Theoretical physics
키워드  
Periodic structures
키워드  
Band diagram
키워드  
Multiple Scattering Theory
키워드  
Photonic crystals
키워드  
Finite element method
기타저자  
University of Michigan Electrical and Computer Engineering
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■24510▼aEfficient  Band  Diagram  Computation  for  Periodic  Structures  Using  Multiple  Scattering  Theory  and  Broadband  Green's  Function  (MST-BBGF)
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a119  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Tsang,  Leung.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aThis  dissertation  presents  a  high-efficiency  computational  framework  for  analyzing  electromagnetic  band  diagrams  in  three-dimensional  (3D)  periodic  photonic  crystals.  Photonic  crystals-artificial  structures  with  periodic  dielectric  modulation-have  enabled  novel  control  over  the  propagation  of  electromagnetic  waves.  Their  ability  to  support  photonic  band  gaps  has  led  to  widespread  applications  in  optical  communications,  quantum  photonics,  and  topological  insulator  design.  However,  computing  band  structures  for  complex  3D  geometries  remains  a  major  challenge.  Traditional  methods  such  as  plane  wave  expansion  (PWE),  finite  element  method  (FEM),  and  finite  difference  time  domain  (FDTD)  suffer  from  significant  computational  bottlenecks,  particularly  when  applied  to  high-index  contrast  materials,  irregular  scatterers,  or  dense  periodic  arrays.To  address  these  limitations,  this  work  introduces  an  advanced  approach  that  combines  Multiple  Scattering  Theory  (MST)  with  the  Broadband  Green's  Function  (BBGF)  technique.  The  MST-BBGF  method  decomposes  the  global  field  problem  into  local  scatterer  interactions,  using  vector  spherical  harmonics  and  Foldy-Lax  equations  to  formulate  a  compact  Korringa-Kohn-Rostoker  (KKR)  eigenvalue  problem.  The  BBGF  technique  accelerates  the  computation  of  periodic  Green's  functions  via  imaginary  wavenumber  deformation,  allowing  for  fast  and  accurate  broadband  evaluations.  Together,  these  techniques  form  a  highly  scalable  and  efficient  solver  that  circumvents  the  need  for  full-domain  volumetric  meshing.A  key  innovation  in  this  dissertation  is  the  introduction  of  a  general  T-matrix  extraction  method  that  enables  modular  modeling  of  arbitrarily  shaped  scatterers.  Unlike  traditional  methods that  rely  on  analytic  forms  (e.g.,  Mie  theory)  or  volume  integration,  this  work  proposes  the  use  of  far-field  scattering  amplitudes-obtained  through  full-wave  numerical  solvers  such  as  FEKO  or  HFSS-to  extract  a  single-scatterer  T-matrix.  Once  computed,  this  T-matrix  can  be  reused  across  all  unit  cells,  regardless  of  the  periodic  configuration,  substantially  improving  computational  efficiency  and  enabling  rapid  parametric  sweeps  across  geometries  and  frequencies. The  developed  MST-BBGF  framework  is  rigorously  validated  through  both  analytical  and  numerical  benchmarks.  Comparisons  against  FEM  simulations  demonstrate  that  the  proposed  method  achieves  results  with  excellent  agreement,  while  reducing  simulation  time  and  memory  requirements  by  two  to  three  orders  of  magnitude.  Analytical  validation  using  spherical  dielectric  scatterers  confirms  that  the  computed  band  diagrams  match  theoretical  predictions  to  within  negligible  errors.  Furthermore,  the  framework  supports  the  flexible  modeling  of  both  sparse  and  dense  periodic  lattices,  accommodating  structures  with  strong  near-field  coupling  and  high-order  multipole  interactions.To  demonstrate  the  full  capability  of  the  method,  the  dissertation  applies  the  MST-BBGF  solver  to  several  complex  and  practically  relevant  structures.  These  include  periodic  arrays  of  two-layer  triangular  prism  scatterers  and  core-shell  resonators,  where  the  T-matrix  must  account  for  multiple  internal  layers  and  asymmetry.  The  method  is  shown  to  capture  subtle  band  shifts  caused  by  high-order  scattering,  and  accurately  predict  the  emergence  of  complete  band  gaps.  In  the  context  of  topological  photonics,  the  framework  is  applied  to  systems  exhibiting  band  inversion  and  edge  state  formation,  highlighting  its  robustness  in  handling  symmetry-breaking  configurations.Overall,  this  dissertation  offers  a  powerful  and  generalizable  computational  tool  for  3D  photonic  crystal  analysis.  The  MST-BBGF  method  combines  physics-based  modeling, mathematical  efficiency,  and  numerical  versatility,  making  it  well  suited  for  current  and  next-generation  photonic  design.  Its  modular  structure  and  rapid  convergence  make  it  particularly  valuable  in  the  context  of  design  optimization,  inverse  photonic  design,  and  machine-learning-assisted  material  discovery.  The  method  opens  new  possibilities  for  analyzing  photonic  crystals,  topological  insulators,  metamaterials,  and  other  periodic  electromagnetic  systems  that  were  previously  out  of  reach  due  to  computational  limitations.
■590    ▼aSchool  code:  0127.
■650  4▼aElectrical  engineering
■650  4▼aComputer  engineering
■650  4▼aMaterials  science
■650  4▼aTheoretical  physics
■653    ▼aPeriodic  structures
■653    ▼aBand  diagram
■653    ▼aMultiple  Scattering  Theory
■653    ▼aPhotonic  crystals
■653    ▼aFinite  element  method
■690    ▼a0544
■690    ▼a0464
■690    ▼a0753
■690    ▼a0794
■71020▼aUniversity  of  Michigan▼bElectrical  and  Computer  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359963▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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