title: Higher-order-mode assisted silicon-on-insulator 90 degree polarization rotator.
abstract: We propose and analyze a 90 degrees polarization rotator based on wave coupling through an intermediate, multimode, axially uniform waveguide. The coupling efficiency of the x- and y-polarized fundamental modes between the horizontal and vertical rectangular waveguides is remarkably enhanced with the help of the TE(01) mode in the multimode waveguide. The polarization rotator has a very short (21-microm) conversion length with a 17.22 dB extinction ratio. It also exhibits a 68-nm bandwidth for polarization conversion efficiency above 90%.
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA. yyue@usc.edu
authors.forename: Yang
authors.initials: Y
authors.lastname: Yue
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Muping
authors.initials: M
authors.lastname: Song
authors.forename: Raymond G
authors.initials: RG
authors.lastname: Beausoleil
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner