[Audio] ECE 695NS: Numerical Simulations of Electro-optic Energy Systems: Recent Episodes
Peter Bermel
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To increase the absorption of the thin film selective solar absorber, multilayer anti-reflection coating is designed and optimized, which consists a layer of SiO2 followed by TiO2. Local optimization is performed for 20 um Si and at 550C. The optimal thicknesses for SiO2 and TiO2 are found to be 100nm and 50nm respectively, which yields 76.59% thermal transfer efficiency at 100 suns concentration. ...
In this presentation, the analysis of the resonant frequencies and fundamental modes of arbitrarily shaped resonant cavities in three dimensions is explored. An incremental insertion Delaunay triangulation algorithm, a medial axis calculation algorithm, an algorithm for meshing the interior of a domain based on the medial axis, and a fast, GPU-based finite element method algorithm were employed to facilitate the exploration....
Outline:Recap from WednesdayOverview of Coupled Mode TheoryDerivation of Coupled Mode EquatiomsApplications:Single WaveguidesAdd-Drop filtersChannel DropT-SplittersNonlinear Kerr Waveguides
Outline:Inverse Opal Photonic Crystals:Photonic Band StructuresPhotonic Crystal PhosphorsPhoton recycling in PVGaAs thin filmsNanowire solar cellsCharacterization of PV materialsTime-resolved photoluminescencePlasmonic structures
Outline:MEEP InterfacesMEEP ClassesTutorial examples:WaveguideMultimode ring resonatorsIsolating individual resonancesKerr nonlinearitiesQuantifying third-harmonic generationRandom and correlated random textured structures
Outline:Introduction to FDTDSpecial features of MEEP:Perfectly matched layersSubpixel averagingSymmetryScheme (programmable) interfaceExamples:Periodic light-trapping structuresRandom and correlated random textured structurtes
Outline:Photonic Crystal Waveguides:Photonic BandstructureDefect Resonant ModesWaveguide TransmissionInverse Opal Photonic Crystals:Photonic Band StructuresPhotonic Crystal Phosphors
Outline:Quantum Espresso Job File StructureSample Structure: Solid MgPerforming 'scf' CalculationsConverging 'scf' EnergiesPerforming 'relax' Calculations
Outline:Slide 1: Title SlideSlide 2-3: Problem DescriptionSlide 4-5: Mathematical Model FormulationSlide 6-7: Proposed Problem SolutionSlide 8-10: Problem Solution ImplementatiomSlide 11-12: Results and Conclusions
Outline:Periodic Solution StrategyStacked periodicityTransverse periodicityS-Matrix SimulationsS4 RCWA solverCapabilitiesLive demonstration
Outline:Ray-optics transfer matrixWave-optics matrix methodsT-matrixR-matrixS-matrixPeriodic solution strategyStacked periodicityTransverse periodicity
Outline:Drift-Diffusion ModelElectronic transport theorySolution schemePoisson solverScharfetter-Gummel schemeNewton's method
Outline:Density Functional Theory (DFT)DFT in Quantum ESPRESSOQuantum ESPRESSO Packages
Outline:Reformulating the EigenproblemSquare Rod Lattice BandstructureTriangular Rod Lattice BandstructurePlotting BandstructuresVisualizing FieldsMaximizing BandgapsDiamond LatticeFinding and Tuning Point Defects
Outline:Drift Diffusion Model Physical EffectsSentaurusApplications:Transistor ModelingIntroduction of Trap StatesEffects of Radiation Strikes
Outline:Static EquilibriumDynamic EquilibriumThermal transport mechanismsThermal transport modeling in MATLAB
Outline:Recap of Drift-DiffusionSolar Cell PhysicsADEPTOverviewInput modalities and optionsOutput data and interpretation
Outline:Fourier AnalysisSampling TheoremDiscrete Fourier TransformsNaïve approachDanielson-Lanczos lemmaCooley-Tukey algorithmVariations of DFTsCorrelation MeasurementsFourier Signal ProcessingFFTWRationalePlanning and Executing DFTsApplication Examples
Outline:Beam Propagation MethodNonlinear Schrodinger EquationFourier space BPMUniform grid BPM with PMLFinite element formulationVectorial BPM mode solver
Outline:Vectorial BPM SolverTunable Photonic Crystal FibersElectro-Optic ModulatorElectro-Optic Switch
Outline:Maxwell eigenproblemMatrix decompositionsReformulating the eigenproblemsIterative eigensolversConjugate gradient solversPreconditionersDavidson solversTargeted solvers
Outline:Bandstructure symmetries2D Photonic bandstructuresPhotonic waveguide bandstructuresPhotonic slab bandstructures3D Photonic lattice types + bandstructures
Outline:Electrostatics PotentialsSolving Ax = bSpin arraysSolving eigenproblemsBandstructure problemBloch's theoremPhotonic bandstructures1D2D
Outline:Time ScalingExamplesGeneral performance strategiesComputer architecturesMeasuring code speedReduce strengthMinimize array writesProfiling
Outline:OverviewDefinitionsComputing MachinesChurch-Turing ThesisPolynomial Time (Class P)Class NPNon-deterministic Turing machinesReducibilityCook-Levin theoremCoping with NP Hardness
Outline:MotivationMy Background and ResearchTopics for This ClassGoals for This ClassAssignments