Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"FDTD simulation"”.
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Broadband whole package FDTD simulation
… a new method for broadband whole package simulation. 3-dimension (3-D) whole package Finite Difference Time Domain (FDTD) simulation result was first reported in detail in this thesis. The FDTD method is a widely used full-wave time-domain simulation method used in the design and analysis …
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Finite-difference time-domain simulation of the Maxwell-Schrödinger system
… study on the finite-difference time-domain (FDTD) simulation of the Maxwell-Schrödinger system is given in this thesis. This system is a very effective tool to simulate and study the light-matter interaction between electromagnetic (EM) radiation and a charged particle in the semi-classical …
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Reconciling modal and time domain techniques in photonic simulation
… dimensional Finite Difference Time Domain (3D-FDTD) simulation serves as the indisputable gold standard for device design and verification in silicon photonics. However, 3D-FDTD is prohibitively expensive for large devices let alone cascaded systems, leading to the pursuit of a diversified …
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High Extinction Ratio Subwavelength 1D Infrared Polarizer by Nanoimprint Lithography
… were optimized by Finite Difference Time Domain (FDTD) simulation. Effects of gold (Au) grating size, numbers of stacked gratings, and dielectric space height were tested in the FDTD study. The fabrication of grating layers was conducted by using nanoimprint lithography. The samples were …
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Compact Trench-Based Silicon-on-Insulator Rib Waveguide 90-Degree and 105-Degree Bend and Splitter Design
… the associated advantages of compactness. With FDTD simulation, we show that single-mode trench based bends and splitters exhibit around 16000nm X 16000nm overall size with low loss for different bending angle. Total efficiency is about 92.9% (90 degree bend), 89.3% (105 degree bend), 92% (90 …
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Light-induced torque at multipolar plasmon resonance
… We perform Finite Difference Time Domain (FDTD) simulation and show that the discrete rotational symmetry of the resonator determines the possible output modes in angular momentum conversion at non-dipolar plasmon resonance. Next, we analyze the efficiency of this conversion for a single, …
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Development of an electromagnetic numerical solver based on the finite difference time domain (FDTD) technique for research and teaching purposes
A 1D-FDTD code was developed to support plane wave excitation in 3D-FDTD domain and the code was developed using C++ programming language. First-order Mur absorbing boundary condition (ABC) is applied to keep outgoing electric and magnetic fields from being reflected into the problem space. In this …
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Phonon polariton interaction with patterned materials
… techniques, and Finite Difference Time Domain (FDTD) simulations in this thesis. The theory surrounding the driving, propagation and detection of these modes is treated in a consistent notational system for both analytical solutions and approximate simulated responses. FDTD simulations in one, …
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Condition assessment of GFRP-retrofitted concrete cylinders using electromagnetic waves
… laboratory radar measurements, numerical simulation, and image reconstruction. It is found that using the developed technique the presence of near-surface defects can be detected by the oblique incidence measurements. Radar signals in the frequency range of 8 GHz to 18 GHz are found …
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The study of surface SHG and polygonal microcavity design for nonlinear applications on LiNbO<sub>3</sub>
… QPM to occur via TIR. The TIR-QPM model and the FDTD simulation were used to demonstrate the potential capability of the double-resonating hexagonal microcavity for efficient SHG. The model to achieve a nonlinear microcavity by periodically poling ring/disk resonator Ti:LiNbO<sub>3</sub> ridge …
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Numerical simulations of the forward problem and compressive digital holographic reconstruction of weak scatterers on a planar substrate
… to automatically locate such small defects from FDTD simulation results. Holography records the electric field from a sparse distribution of particle scattering; compressive sensing retrieves a clean signal from the original measured signal corrupted by shot noise and other system noise with a …
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Development of GPR data analysis algorithms for predicting thin asphalt concrete overlay thickness and density
… pipes using finite difference time domain (FDTD) simulation. Second, as a special case of the 2-D GPR imaging and linear inversion reconstruction, regularized deconvolution was applied to GPR signals reflected from thin AC overlays. Four types of regularization methods, including Tikhonov …
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Time-Domain Simulation of Sound Propagation in Frequency-Dependent Materials
… geometries. The finite difference time-domain (FDTD) method is implemented on the linearized Euler equation (LEE), along with the immersed boundary (IB) method and other numerical techniques to simulate the acoustic wave propagation in air, water, porous media and biological tissues. When …
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Detection and assessment of wood decay – glulam beams and wooden utility poles
… two-dimensional, finite difference time domain (FDTD) simulation to model wave propagation through the pole. The simulation is validated against empirical results. The through-transmission technique used on the glulam beam locates rot through the use of the highest magnitude frequency and area …
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Surface plasmons for enhanced metal-semiconductor-metal photodetectors
… investigated. Finite Difference Time Domain (FDTD) simulation is used to simulate and design plasmonic MSM-PDs devices for maximal field enhancement. The simulation results show more than 10 times enhancement for the plasmonic nano-grating MSM-PD compared with the device without the metal …
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Functional nanostructured plasmonic materials: fabrication, simulation, imaging and sensing applications
… detection. Finite-Difference Time-Domain (FDTD) calculations were carried out to model the optical response of the system and gain insight into the physics of the system. New classes of plasmonic crystals were developed using new materials and fabrication methods, in concert with rational …
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H-BN integration in III-nitride devices for green hydrogen applications
… production is evaluated through numerical simulations. The most efficient InGaN photoelectrode identified through these studies is selected for a techno-economic analysis to assess the technology viability at a commercial scale. This analysis evaluates the competitiveness of a fully …
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Fabrication, design, and analytical applications of nanostructured plasmonic crystals
… crystals. Finite-Difference Time-Domain (FDTD) simulations were used to verify the optical behavior of bimetallic plasmonic crystals and to understand the optimized device form factor. A label-free optical imaging technique using plasmonic crystal was developed to quantitatively …