Open AccessUnidirectional emission from a cardioid-shaped microcavity laser
Author(s) -
In-Goo Lee,
Sung-Min Go,
Jinhyeok Ryu,
Yi Cui,
Sung-Bock Kim,
Kwang Ryung Oh,
Chil-Min Kim
Publication year - 2016
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.24.002253
Subject(s) - laser , optics , semiconductor laser theory , materials science , excited state , optoelectronics , semiconductor , physics , atomic physics
We find unidirectional emission in a cardioid-shaped microcavity laser. When a deformation parameter is well adjusted, rays starting around a period-5 unstable periodic orbit emit unidirectionally. To confirm the emission direction, we fabricate a laser by using an InGaAsP semiconductor and investigate emission characteristics. When the laser is excited by current injection with a dc current, resonances localized on the period-5 unstable periodic orbit emit unidirectionally.