A novel RC-FDTD algorithm for the Drude dispersion analysis

authored by

A. Cala' Lesina, A. Vaccari, A. Bozzoli

Abstract

One of the main techniques for the Finite-Difference Time-Domain (FDTD) analysis of dispersive media is the Recursive Convolution (RC) method. The idea here proposed for calculating the updating FDTD equation is based on the Laplace transform and is applied to the Drude dispersion case. A novel RC-FDTD algorithm, that we call modified, is then deduced. We test our algorithm by simulating gold and silver nanospheres exposed to an optical plane wave and by comparing the results with the analytical solution. The modified algorithm guarantees a better overall accuracy of the solution, in particular at the plasmonic resonance frequencies.

External Organisation(s)

Fondazione Bruno Kessler

Type

Article

Journal

Progress In Electromagnetics Research M

Volume

24

Pages

251-264

No. of pages

14

ISSN

1937-8726

Publication date

2012

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Electronic version(s)

https://doi.org/10.2528/PIERM12041904 (Access: Open)