Measurement of a compact colorless 3 dB hybrid plasmonic directional coupler.

We fabricated and measured a compact 3 dB hybrid plasmonic directional coupler for silicon photonics integrated circuits with a length of 21.2 µm. The coupler has a 50∶50 coupling ratio over a spectral bandwidth of more than 100 nm around a wavelength of 1.55 µm and has an insertion loss of less than 1 dB.

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.

Compact low loss and broadband hybrid plasmonic directional coupler.

We propose a novel broadband coupler for silicon photonics using a hybrid plasmonic waveguide section. The hybrid plasmonic waveguide is used to create an asymmetric section in the middle of a silicon nanowire waveguide coupler to introduce a phase delay to allow for a 3-dB power coupling ratio over a 150 nm bandwidth around 1.55 µm. The device is very compact (<8.5 µm) and has a low insertion loss (<0.15 dB).

Compact hybrid plasmonic polarization rotator.

We propose a novel ultracompact (5 µm) hybrid plasmonic polarization rotator operating at telecommunication wavelength for integrated silicon photonic circuits. The polarization mode of a silicon waveguide is rotated with >14 dB polarization extinction ratio and low total insertion losses of 2.1 dB.