title: Polarization-rotating, Bragg-grating filters on silicon-on-insulator strip waveguides using asymmetric periodic corner corrugations.
abstract: We report on a wavelength-selective, polarization-rotating filter using a partially etched asymmetric Bragg grating on a compact single-mode, silicon-on-insulator (SOI) strip waveguide. The asymmetric Bragg grating rotates and reflects the fundamental transverse electric (TE) and transverse magnetic (TM) modes at selected wavelengths. Our device offers wavelength-selective, polarization-rotating reflection at its reflection port and wavelength-selective, polarization-independent notch filtering at its through port. The device is fabricated using a CMOS-compatible process with 193 nm-deep ultraviolet lithography on an SOI platform. We present results for a 294.4 μm long device that has a 3 dB bandwidth of 2.63 nm and a low-excess loss of less than 1 dB. This device also has a maximum polarization-extinction-ratio of greater than 27 dB.
authors.forename: Han
authors.initials: H
authors.lastname: Yun
authors.forename: Zhitian
authors.initials: Z
authors.lastname: Chen
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Jonas
authors.initials: J
authors.lastname: Fluekiger
authors.forename: Michael
authors.initials: M
authors.lastname: Caverley
authors.forename: Lukas
authors.initials: L
authors.lastname: Chrostowski
authors.forename: Nicolas A F
authors.initials: NA
authors.lastname: Jaeger