Experimental demonstration of an integrated hybrid plasmonic polarization rotator.

We experimentally demonstrate an ultracompact (3.7 μm long) hybrid plasmonic polarization rotator operating around 1.55 μm for integrated silicon photonics circuits. The TM polarization of a silicon waveguide is rotated to the TE polarization with insertion losses as low as 1.5 dB and polarization extinction ratios larger than 13.5 dB.