title: Compact low loss and broadband hybrid plasmonic directional coupler.
abstract: 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).
authors.affiliation: Department of Electrical and Computer Engineering University of Toronto, 10 King's College Rd.,Toronto, Ontario M5S 3G4, Canada. muhammad.alam@mail.utoronto.ca
authors.forename: M Z
authors.initials: MZ
authors.lastname: Alam
authors.forename: J Niklas
authors.initials: JN
authors.lastname: Caspers
authors.forename: J S
authors.initials: JS
authors.lastname: Aitchison
authors.forename: M
authors.initials: M
authors.lastname: Mojahedi