Broadband Silicon TM-Pass Polarizer using a Slot-Assisted Periodic Waveguide

We demonstrate a compact (21 μm × 0.5 μm) silicon TM-pass polarizer based on a slot-assisted periodic waveguide. Measured results show low insertion loss for the TM mode (average 0.7 dB) and high TE loss (average 41.3 dB) over a 100 nm wavelength range, centered at 1.55 μm.