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The effect of media parameters on wave propagation in a chiral metamaterials slab using FDTD
Author(s) -
Wang M. Y.,
Li G. P.,
Zhou M.,
Wang R.,
Zhong C. L.,
Xu J.,
Zheng H.
Publication year - 2013
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1902
Subject(s) - metamaterial , finite difference time domain method , slab , physics , permittivity , dispersion relation , discretization , boundary value problem , differential equation , electromagnetic field , dielectric , optics , mathematical analysis , mathematics , quantum mechanics , geophysics
SUMMARY Because the permittivity, permeability, and chirality parameters of chiral metamaterials (CMMs) are frequency dependent, the wave equations that describe the characters of electromagnetic wave propagation in CMMs are presented and discretized on the basis of auxiliary differential equation technique in finite‐difference time‐domain method. The total‐field/scattered‐field, Mur's first‐order absorbing and dielectric boundary conditions for CMMs slab are discussed in the paper. Numerical results show that the cross‐polarized reflected coefficient of the CMMs slab is zero. Negative index of refraction phenomenon and optical property of giant optical activity in CMMs slabs are illustrated with 1D auxiliary differential equation–finite‐difference time‐domain method. The effects to positive or negative phase velocity caused by media parameters of CMMs are studied. Copyright © 2013 John Wiley & Sons, Ltd.