Investigation of Asymmetric Transmission Properties of 2D Metallic Photonic Crystal for Optical Diode Application

Abstract

Current studies combined optics and photonics provide the most promising materials for potential technological and industrial applications, because of their exciting optical and electronic properties. Metals show a lot of optical phenomena associated with their rich dispersion properties, and are widely used in the range from visible to THz frequencies. In this study, asymmetric transmission properties of 2-D photonic crystals have been studied. The effects of different geometric and optical parameters on the transmission are investigated by using MATLAB and freely available MEEP software based on the FDTD method. A novel structure made of silver is used to manipulate electromagnetic propagation of different wave lengths. The simulation results represent transmittance values for the TM mode where the electromagnetic propagation transverse to the same way of incidence wave. As a result, the best comparative asymmetric transmittance values are obtained as 0.75, and 0.15 from top and bottom sides, respectively.