Simple Trapezoidal Recursive Convolution Technique for the Frequency-Dependent FDTD Analysis of a Drude–Lorentz Model

概要

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A concise formulation of the frequency-dependentfinite-difference time-domain (FDTD) method is presented usingthe trapezoidal recursive convolution (TRC) technique for theanalysis of a Drude–Lorentz model. The TRC technique requiressingle convolution integral in the formulation as in the recursiveconvolution (RC) technique, while maintaining the accuracy comparableto the piecewise linear RC (PLRC) technique with twoconvolution integrals. The TRC technique is introduced not only to the traditional explicit FDTD, but also to the unconditionally stable implicit FDTD based on the locally one-dimensional (LOD)scheme. Through the analysis of a surface plasmon waveguide, the effectiveness of the TRC technique is investigated for both explicitFDTD and LOD-FDTD, along with the existing RC and PLRC LOD-FDTD, along with the existing RC and PLRCtechniques.
2009-01-02