Open AccessLowest threshold lasing modes localized on marginally unstable periodic orbits in a semiconductor microcavity laser
Author(s) -
In-Goo Lee,
Yi Cui,
Jiwon Lee,
Hyeon-Hye Yu,
Jinhyeok Ryu,
Sunjae Gwak,
Hyundong Kim,
Kwang-Ryong Oh,
Chil-Min Kim
Publication year - 2020
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.396480
Subject(s) - lasing threshold , resonance (particle physics) , optics , semiconductor laser theory , physics , laser , gain switching , scattering , whispering gallery wave , materials science , normal mode , atomic physics , vibration , quantum mechanics
The lowest threshold lasing mode in a rounded D-shape microcavity is theoretically analyzed and experimentally demonstrated. To identify the lowest threshold lasing mode, we investigate threshold conditions of different periodic orbits by considering the linear gain condition due to the effective pumping region and total loss consisting of internal and scattering losses in ray dynamics. We compare the ray dynamical result with resonance mode analysis, including gain and loss. We find that the resonance modes localized on the pentagonal marginally unstable periodic orbit have the lowest threshold in our fabrication configuration. Our findings are verified by obtaining the path lengths and far-field patterns of lasing modes.