title: Efficient and compact TE-TM polarization converter built on silicon-on-insulator platform with a simple fabrication process.
abstract: An efficient TE-TM polarization converter built on a silicon-on-insulator nanophotonic platform is demonstrated. The strong cross-polarization coupling effect in air-cladded photonic-wire waveguides is employed to realize the conversion. A peak TE-TM coupling efficiency of 87% (-0.6 dB insertion loss) is measured experimentally. A polarization conversion efficiency of >92% with an overall insertion loss of <-1.6 dB is obtained in a wavelength range of 40 nm. The proposed device is compact, with a total length of 44 μm and can be fabricated with one lithography and etching step.
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads Building 343, 2800 Lyngby, Denmark. realdream.liuliu@gmail.com
authors.forename: Liu
authors.initials: L
authors.lastname: Liu
authors.forename: Yunhong
authors.initials: Y
authors.lastname: Ding
authors.forename: Kresten
authors.initials: K
authors.lastname: Yvind
authors.forename: Jørn M
authors.initials: JM
authors.lastname: Hvam