Polarization Rotator on Silicon Strip Waveguide using Tilted Bragg Grating

We propose a polarization rotator using partially-etched tilted Bragg grating on a strip waveguide. Our structure features a compact device footprint of $\boldsymbol{25.2 \mu \mathrm{m}}$ with insertion loss and crosstalk of −1 dB and −20 dB, respectively, while switching the polarization state among fundamental modes (TM/TE).