Abstract
We present the design and simulation of an ultra-compact polarization beam splitter (PBS) by combining a photonic crystal (PhC) multimode waveguide and an internal PhC section. The PhC multimode waveguide is designed to collect the powers re∞ected by or transmitted through the internal PhC structure which serves as a polarization sensitive scatterer. Plane wave expansion (PWE) method is used to calculate the band structure and the flnite-difierence time- domain (FDTD) method is employed to obtain the spectrum response. The simulation results show that the present design can give an ultra- compact PBS with high extinction ratio over a broad bandwidth.
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