Open AccessUnidirectional emission of high-Q scarred modes in a rounded D-shape microcavity
Author(s) -
Jiwon Lee,
Yi Cui,
Myung-Woon Kim,
Jinhyeok Ryu,
Kwang-Ryong Oh,
Chil-Min Kim
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.034864
Subject(s) - lasing threshold , optics , resonance (particle physics) , laser , semiconductor laser theory , physics , diffraction , semiconductor , whispering gallery wave , q factor , resonator , materials science , optoelectronics , atomic physics
We propose a deformed microcavity laser, where a high-Q mode group emits unidirectionally. The cavity comprises three circular arcs and one linear section. To minimize diffraction effects from the boundary, three circular arcs and one linear section are tangentially connected. By adjusting the sizes and the positions of the two sub-circular arcs, unidirectionality is maximized. In an experiment with an InP based InGaAsP semiconductor microcavity laser, a lasing mode group localized on aperiod-7 unstable periodic orbit emits unidirectionally. In our resonance calculation, a high-Q factor is confirmed.