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A PML-FDTD formulation for the simulation of optical structures

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 1999年第5期22卷 355-358页

作者： AlSunaidi, MA ElSallal, W King Fahd Univ Petr & Minerals Dhahran 31261 Saudi Arabia

A formulation of the PML technique suitable for the FDTD simulation of optical structures is presented. The FDTD formulation is based on the scalar-wave equation. The resulting algorithm is stable, efficient, and effective. Numerical results show that the technique provides an excellent level of absorption with a reasonable amount of absorbing thickness. (C) 1999 John Wiley & Sons, Inc.

关键词： finite-difference time-domain method dielectric waveguides optical structures

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An analysis of the finite-difference time-domain method for modeling the microwave heating of dielectric materials within a three-dimensional cavity system

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JOURNAL OF MICROWAVE POWER AND ELECTROMAGNETIC ENERGY 1996年第4期31卷 199-214页

作者： Zhao, H Turner, IW School of Mathematics Queensland University of Technology Brisbane QLD 4001 Australia

In this paper, an investigation of the microwave heating of a lossy material located inside a cavity by the finite-difference time-domain (FD-TD) method is undertaken. The emphasis of this work focuses on the performance of the FD-TD method when certain traditional assumptions are used within the framework of the model. The limitations of these assumptions will be deliberated and more accurate counterparts will be proposed and tested. In particular, it will be shown that when only a single mode is assumed to exist around the aperture between the waveguide and the cavity, spurious numerical results arise. Further, the numerical simulation indicates that the treatment of the interfacial boundary condition located between free-space and the material becomes very important when predicting the dissipated power distribution for a lossy dielectric material. A new approximation of this interfacial boundary condition is developed and a comparison between existing and new methodologies is made. The treatment of singular field behavior near sharp edges of the cavity is also examined and a study of the effect of using different techniques to model regions where this condition arises is presented. In order to validate the numerical simulation results, comparisons against experimental data sets previously reported in the literature will be made. In summary, the new techniques proposed in this research yield a solution of high accuracy and demonstrate an increased flexibility for simulating microwave systems. It will be shown that the FD-TD method satisfies the important Maxwell equation field divergence condition everywhere within the applicator.

关键词： finite-difference time-domain method multimode cavity input waveguide interface boundary condition edge behavior power density distribution

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Analysis of photonic crystals for light emitting diodes using the finite difference time domain technique

Analysis of photonic crystals for light emitting diodes usin...

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SPIE Conference on Physics and Simulation of Optoelectronic Devices

作者： Boroditsky, M Coccioli, R Yablonovitch, E Univ Calif Los Angeles Dept Phys Los Angeles CA 90024 USA

ISBN: (纸本)0819427225

The finite difference time domain method has been used to analyze the dispersion diagram of a photonic crystal comprised of a perforated dielectric slab and the properties of a micro-cavity formed by introducing a defect into such a crystal. Computational requirements of the method, its advantages and disadvantages, and results for the structure analyzed are discussed.

关键词： Photonic crystals Crystals Dielectrics finite-difference time-domain method Light emitting diodes Wave propagation Dispersion Electromagnetism Radio propagation Modulation

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A novel implementation of Berenger's PML for FDTD applications

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IEEE MICROWAVE AND GUIDED WAVE LETTERS 1998年第10期8卷 324-326页

作者： Akleman, F Sevgi, L ITU Dept Elect & Comp Engn Istanbul 80626 Turkey Raytheon Canada Ltd Waterloo ON N2J 4K6 Canada

In this letter, a new implementation of the three-dimensional (3-D) perfectly matched layer (PML) in finite-difference time-domain (FDTD) applications is introduced. This technique is based on doubling the cell dimensions in PML region where extra averaging of electrical field components are necessary at the edges and faces along the PML-FDTD interfaces. The presented numerical examples are for 3-D structures which exhibit complex wave phenomena. Significant improvement obtained after this implementation, especially at lower frequencies, is demonstrated.

关键词： absorbing boundary condition finite-difference time-domain method perfectly matched layer

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Computation of aperture antenna mutual coupling using FDTD and Kirchhoff field transformation

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ELECTRONICS LETTERS 1998年第12期34卷 1167-1168页

作者： Parfitt, AJ Bird, TS Univ Adelaide Dept Elect & Elect Engn Adelaide SA 5005 Australia CSIRO Epping NSW 2121 Australia

A new method for computing the mutual coupling between aperture antennas using the finite-difference time-domain (FDTD) method together with the Kirchhoff near-field to near-field transformation is described. The meth... 详细信息

关键词： aperture antenna mutual coupling aperture antennas Kirchhoff field transformation antenna theory FDTD method widely spaced antenna elements finite difference time-domain analysis array finite-difference time-domain method antenna arrays

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Realisation of magnetic conducting surface using novel photonic bandgap structure

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ELECTRONICS LETTERS 1998年第21期34卷 2041-2042页

作者： Ma, KP Hirose, K Yang, FR Qian, Y Itoh, T Univ Calif Los Angeles Dept Elect Engn Los Angeles CA 90404 USA

The realisation of a magnetic conducting surface using a novel two-dimensional uniplanar photonic bandgap structure is described. This novel idea is verified by measured results and the results obtained using the fini... 详细信息

关键词： magnetic conducting surface Light propagation Other numerical methods finite difference time-domain analysis photonic band gap two-dimensional uniplanar photonic bandgap structure surface magnetism finite-difference time-domain method

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Comparison of a recursive T matrix method and the FDTD method for scattering problems in lossy dispersive soil

Comparison of a recursive T matrix method and the FDTD metho...

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SPIE Conference on Detection and Remediation Technologies for Mines and Minelike Targets III

作者： Winton, SC Sahin, A Rappaport, CM Miller, E Northeastern Univ Ctr Electromagnet Res Boston MA 02115 USA

ISBN: (纸本)0819428418

A comparison between two forward solving methods, recursive T-matrix and FDTD, is presented. The strengths and weaknesses of both methods are discussed. The recursive T-matrix method is a fast solver that is well suited to solutions in homogeneous media where the scatterers are bodies of rotation. The FDTD method is best suited to complicated and realistic problems involving inhomogeneities, rough surface interfaces and irregular shaped scatterers. Numeric results from both methods are presented.

关键词： finite-difference time-domain method Scattering Dielectrics Dispersion Bessel functions Electromagnetism Interfaces Land mines Matrices Receivers

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FDTD Simulations of quasi-optical MESFET oscillator arrays

FDTD Simulations of quasi-optical MESFET oscillator arrays

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4th International Conference on Millimeter and Submillimeter Waves and Applications

作者： Ren, JS Wang, XD Hwu, RJ Univ Utah Dept Elect Engn Salt Lake City UT 84112 USA

ISBN: (纸本)0819429201

A method for the FDTD analysis of quasi-optical MESFET arrays is presented in this paper. To analyze active devices such as MESFETs, this method creates a set of field-state central finite difference equations;and all the field and state variables are solved simultaneously at the same FDTD time step. It will be shown in this paper that this formulation is simple and straightforward. The analysis of quasi-optical MESFET oscillator arrays have been performed to show the application of this method. Excellent agreements have been obtained between the results from this simulation method, from commercial softwares, and from experimental measurements to show the validity of this method.

关键词： finite-difference time-domain method Field effect transistors Oscillators Mirrors Circuit switching Dielectrics Inductance Magnetism Astatine Extremely high frequency

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Three dimensional nonlinear optical fiber simulation

Three dimensional nonlinear optical fiber simulation

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4th International Conference on Millimeter and Submillimeter Waves and Applications

作者： Sullivan, DM Kuzyk, M Univ Idaho Dept Elect Engn Moscow ID 83844 USA

ISBN: (纸本)0819429201

In the development of nonlinear optical switching mechanisms, it would be very desirable to have a computer simulation of the electromagnetic pulse propagating in the nonlinear fiber. This would be helpful in understanding the underlying electromagnetics, and would also be helpful in designing new switching configurations, One method which has been widely used in electromagnetic simulation is the finite-difference time-domain (FDTD) method. Its effectiveness in optical fiber simulation is restricted by the fact that the short wavelengths of light dictate dense sampling, which becomes a logistical problem in three dimensional simulation. Techniques are described which allow 3D simulation of small sections of nonlinear optical fibers. The results of these simulations are used to predict behavior over longer distances.

关键词： finite-difference time-domain method Optical simulations Optical fibers Switching Computer simulations Phase shifts Radio propagation Wave propagation Electromagnetism Nonlinear optics

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FDTD analysis of optical forces on a nanometric object in the near zone of a metal slit 5

FDTD analysis of optical forces on a nanometric object in th...

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5th Congress on Modern Optics

作者： Chang, S Choi, WH Jo, JH Chung, ST Hannam Univ Dept Phys Taejon South Korea

A finite-difference time-domain (FDTD) method is used to examine the optical force acting on a nanometric object in the near zone of a metal slit Numerical results show that the object of refractive index N=1.5 can be... 详细信息

ISBN: (纸本)0819430382

关键词： finite-difference time-domain method Metals Refractive index Electromagnetic radiation Electromagnetism Particles Magnetism Optical tweezers Scattering Physics

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