A Novel FDTD Formulation to Model Dispersive Chiral Media

Wave propagation in a general dispersive chiral media is examined by a novel finite difference time domain (FDTD) technique. Using convolutional integrals directly in time domain without use of transformation techniques such as Z-and Mobius transformations, wave field decomposition is the main idea to drive the FDTD formulation. Time domain permittivity, permeability, and chirality of dispersive materials are found from their frequency domain expressions. These time domain models are used in convolutional terms to model wave propagation in dispersive chiral media. The co- and cross-polarized reflected and transmitted waves from a chiral slab illuminated by a normally incident plane wave are investigated. The results have a good agreement with previous ones using Z-transformation technique.