Numerical Study of 1D Wave Propagation through Double Negative Photonic Crystal

Abstract

Photonic crystals are having many applications in different fields like wave guides, high efficiency antenna etc. The conventional photonic crystal contains alternating layers of Double Positive media having high and low positive refractive index values. Recently another kind of unconventional photonic crystal is proposed which consists of a Double Negative meta-material and a Double Positive medium. While in conventional photonic crystals the band gaps are formed due to Bragg scattering of fields, in unconventional photonic crystals the band gaps are formed due to both Bragg scattering and volume averaged zero refractive index of the unit cell. Here we propose a new kind of photonic crystal which consists of two Double Negative meta-materials having different refractive indices. The computational study of the propagation of electromagnetic wave through one dimensional Double Negative photonic crystal is reported. One dimensional Finite Difference Time Domain method is used for the study. Drude model is used in this paper to define the dispersion property of Double Negative media.