Design of power beam splitter based on photonic crystal waveguide

Abstract

Existing power beam splitter has complex structure and is not easy to implement. The power beam splitters of 1×2 and 1×3 were designed based on two-dimensional square lattice photonic crystals. The beam splitters consist of a photonic crystal waveguide composed of gallium arsenide rods and tellurium dielectric rods defects. Defects are introduced into the self-collimated photonic crystal, and the material parameters are controlled by an applied electric field, thereby changing the beam splitting ratio and achieving tuned beam splitting. The efficiency of the 1×2 beam splitter designed by simulation analysis is the lowest, and the other efficiency is relatively high. It is confirmed that the light waves corresponding to 1200nm can be transmitted normally in the line defect, and the light waves of 1000 nm and 1400nm are only dispersed into these bandgaps. Since the propagation of light waves in these bandgaps causes energy loss, the beam splitting function cannot be achieved.