Compact transverse-magnetic-pass polarizer based on one-dimensional photonic crystal waveguide

摘要

We propose a compactly integrated transverse-magnetic (TM)-pass polarizer based on rectangular-shape one-dimensional photonic-crystal silicon waveguide with an extremely high polarization extinction ratio of ＞30 dB and low insertion loss (～1 dB) over a broad wavelength range of 210 nm from 1,460 nm to 1,670 nm. The polarizer has been numerically simulated using three-dimensional finite-difference time-domain (3D FDTD) method. The optimum length of the proposed TM-pass polarizer is about 4 μm. At the 1,550 nm wavelength, the simulated polarization extinction ratio of the polarizer is 36 dB, and its corresponding insertion loss is about 1 dB.