Open AccessDispersive contour-path algorithm for the two-dimensional finite-difference time-domain method
Author(s) -
Ahmad Mohammadi,
Tahmineh Jalali,
Mario Agio
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.007397
Subject(s) - finite difference time domain method , optics , algorithm , color difference , finite difference method , physics , mathematical analysis , mathematics , computer science , filter (signal processing) , computer vision
We have extended the contour-path effective-permittivity (CP-EP) finite-difference time-domain (FDTD) algorithm by A. Mohammadi, et al., Opt. Express 13, 10367 (2005), to linear dispersive materials using the Z-transform formalism. We test our method against staircasing and the exact solution for plasmon spectra of metal nanoparticles. We show that the dispersive contour-path (DCP) approach yields better results than staircasing, especially for the cancellation of spurious resonances.