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
收藏
页码：1699 / 1703
页数：5
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