Design of self-collimating photonic crystal polarization beam splitter

the splitting properties of the polarization beam splitter (PBS) have been numerically studied using the finite difference time domain method. Based on the analysis of relationship between the self-collimating transmission frequency and radius of air hole for two-dimensional square lattice in photonic crystals, a self-collimating polarization beam splitter is designed. Low-loss transmission, wide angle bending and high splitting ratio can be realized in this structure.