Analysis of double negative media with magneto-electric coupling using a novel dispersive FDTD formulation

A newly developed FDTD technique for modeling electromagnetic wave interactions with dispersive chiral media is introduced in this paper. This method is based on a decomposition of the electromagnetic fields into components that are uncoupled and propagate in an equivalent isotropic media with effective material parameters. The electric and magnetic dispersive properties of the medium are represented by Lorentzian waveforms and the dispersive nature of the chirality parameter is described by a Condon model. The validity of this method was established for the propagation of an electromagnetic wave through a dispersive chiral slab. The results generated from the new dispersive chiral FDTD scheme demonstrate excellent agreement with their analytical counterparts. The formulations presented provide a useful tool for investigating a variety of potential applications for dispersive chiral metamaterials.