Efficient Demultiplexing of Two Channels Based on Quasi-Square Ring Resonator for Integrated Optics

In this work a dual band demultiplexer was achieved based on a 2D photonic crystals with cylindrical gallium arsenic GaAs dielectric rods in square air lattice slab, the proposed architecture is based on ring resonators that consist of four nano-ring cavities embedded in a micro cavity, the demultiplexer functions around 1.330 and 1.550 µm simultaneously. The achieved results show a quality factor of 155 and a transmission efficiency of 85% and 95% around 1.330 and 1.550 µm respectively.