Photonic Crystal Cavity with L3-Defect for Resonant Optical Filtering

Abstract

AbstractA novel design of optical filter based on photonic crystal structure is proposed in this paper. For designing the proposed filter we introduce an L3 resonant cavity between the input and output waveguides. We study the impact of different parameters on the filtering behavior of the structure using plane wave expansion and finite difference time domain methods. The initial form of this filter is capable of selecting the optical waves at λ = 1557.8 nm and the transmission efficiency of the filter is obtained about 84%. The total footprint of the filter is less than 205 μm