title: Enhanced radiation-loss-based radial-waveguide-coupled electrically pumped microresonator lasers with single-directional output.
abstract: A novel enhanced radiation-loss (ERL)-based radial waveguide coupling mechanism for microresonator lasers is experimentally demonstrated for the first time, to the best of our knowledge, resulting in single-directional output from the lasers. A 20 microm diameter InGaAsP/InP electrically pumped microresonator laser in the form of a microcylinder resonator integrated with a transparent ERL radial output coupler is designed and fabricated. Measurement shows a low 1.5 mA lasing threshold and a relatively high output power of >0.4 mW.
authors.affiliation: Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208, USA. f-ou@northwestern.edu
authors.forename: Fang
authors.initials: F
authors.lastname: Ou
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Li
authors.forename: Boyang
authors.initials: B
authors.lastname: Liu
authors.forename: Yingyan
authors.initials: Y
authors.lastname: Huang
authors.forename: Seng-Tiong
authors.initials: ST
authors.lastname: Ho