title: Polarization rotator-splitters and controllers in a Si3N4-on-SOI integrated photonics platform.
abstract: We demonstrate novel polarization management devices in a custom-designed silicon nitride (Si(3)N(4)) on silicon-on-insulator (SOI) integrated photonics platform. In the platform, Si(3)N(4) waveguides are defined atop silicon waveguides. A broadband polarization rotator-splitter using a TM0-TE1 mode converter in a composite Si(3)N(4)-silicon waveguide is demonstrated. The polarization crosstalk, insertion loss, and polarization dependent loss are less than -19 dB, 1.5 dB, and 1.0 dB, respectively, over a bandwidth of 80 nm. A polarization controller composed of polarization rotator-splitters, multimode interference couplers, and thin film heaters is also demonstrated.
authors.forename: Wesley D
authors.initials: WD
authors.lastname: Sacher
authors.forename: Ying
authors.initials: Y
authors.lastname: Huang
authors.forename: Liang
authors.initials: L
authors.lastname: Ding
authors.forename: Tymon
authors.initials: T
authors.lastname: Barwicz
authors.forename: Jared C
authors.initials: JC
authors.lastname: Mikkelsen
authors.forename: Benjamin J F
authors.initials: BJ
authors.lastname: Taylor
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Lo
authors.forename: Joyce K S
authors.initials: JK
authors.lastname: Poon