title: Designing coupled microcavity lasers for high-Q modes with unidirectional light emission.
abstract: We design coupled optical microcavities and report directional light emission from high-Q modes for a broad range of refractive indices. The system consists of a circular cavity that provides a high-Q mode in the form of a whispering gallery mode, whereas an adjacent deformed microcavity plays the role of a waveguide or collimator of the light transmitted from the circular cavity. As a result of this very simple, yet robust, concept we obtain high-Q modes with promising directional emission characteristics. No information about phase space is required, and the proposed scheme can be easily realized in experiments.
authors.affiliation: Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden, Germany. jwryu@pks.mpg.de
authors.forename: Jung-Wan
authors.initials: JW
authors.lastname: Ryu
authors.forename: Martina
authors.initials: M
authors.lastname: Hentschel