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Simple frequency-dependent FDTD algorithm for a Drude-critical points model

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5 Author(s)
Jun Shibayama ; Faculty of Engineering, Hosei University, 3-7-2, Kajino-cho, Koganei, Tokyo 184-8584, Japan ; Keisuke Watanabe ; Ryoji Ando ; Junji Yamauchi
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A simple trapezoidal recursive convolution (TRC) technique is used to develop a frequency-dependent FDTD method for the analysis of the Drude-critical points (D-CP) model. Numerical accuracy is investigated through the analysis of pulse propagation in a metal (aluminum) cladding waveguide. The TRC technique with a single convolution integral is found to provide the numerical results comparable to the piecewise linear RC counterparts with two convolution integrals. The D-CP model is shown to successfully yield the wide transmission spectrum that closely follows the spectrum predicted using measured permittivities, not obtainable from the Drude-Lorentz model.

Published in:

2010 Asia-Pacific Microwave Conference

Date of Conference:

7-10 Dec. 2010