Dispersive Contour-Path FDTD Algorithm for the Drude-Lorentz Model

被引：7

作者：

Shibayama, Jun ^{[1
]}

Suzuki, Kazuto ^{[1
]}

Iwamoto, Tetsuya ^{[1
]}

Yamauchi, Junji ^{[1
]}

Nakano, Hisamatsu ^{[1
]}

机构：

[1] Hosei Univ, Fac Sci & Engn, Tokyo 1848584, Japan

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2020年 / 19卷 / 10期

关键词：

Dispersive media; Drude-Lorentz (DL) model; surface plasmon polariton (SPP); trapezoidal recursive convolution (TRC); Z transform (ZT); SCATTERING; LIGHT;

D O I：

10.1109/LAWP.2020.3014344

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A dispersive contour-path algorithm is newly introduced into the finite-difference time-domain method for the analysis of arbitrarily shaped dispersive media expressed by the Drude-Lorentz (DL) model. The frequency-dependent formulation is performed using the simple trapezoidal recursive convolution technique. A faster convergence of the numerical results for an Au cylinder is found to be achieved over a wide wavelength range. In addition, the present method can suppress the spurious localization of surface plasmons caused by the conventional staircase approximation. The transmission characteristics of a grating consisting of a metal cylinder array are also revealed and discussed.

引用

页码：1699 / 1703

页数：5

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