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Proceedings Paper

A powerful new approach for the treatment of dispersive media in finite-difference time-domain method
Author(s): Minghui Han; Robert W. Dutton; Shanhui Fan
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Paper Abstract

We show here that both the Debye poles and Lorentz pole pairs are special cases of complex-conjugate pole-residue pairs, and the general form of such pairs in fact offers us a much more efficient approach of treating real dispersive media in FDTD than the usual ones that are based on Debye poles and Lorentz pole pairs. We first derive a unified formulation of the auxiliary differential equation method for arbitrary dispersive media by using these pairs. We then use this formulation to perform several numerical experiments, including the permittivity of noble metal Ag and the electroabsorption coefficient of semiconductor quantum wells. The result of these experiments clearly demonstrates the feasibility and advantages of using these pairs in treating dispersive media in FDTD.

Paper Details

Date Published: 23 August 2005
PDF: 7 pages
Proc. SPIE 5926, Tuning the Optical Response of Photonic Bandgap Structures II, 59260E (23 August 2005); doi: 10.1117/12.629502
Show Author Affiliations
Minghui Han, Stanford Univ. (United States)
Robert W. Dutton, Stanford Univ. (United States)
Shanhui Fan, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 5926:
Tuning the Optical Response of Photonic Bandgap Structures II
Philippe M. Fauchet; Paul V. Braun, Editor(s)

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