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Multimode Emission in GaN Microdisk Lasers.

Authors :
Drechsler, Monty L.
Choi, Luca Sung‐Min
Tabataba‐Vakili, Farsane
Nippert, Felix
Koulas‐Simos, Aris
Lorke, Michael
Reitzenstein, Stephan
Alloing, Blandine
Boucaud, Philippe
Wagner, Markus R.
Jahnke, Frank
Source :
Laser & Photonics Reviews; Oct2024, Vol. 18 Issue 10, p1-7, 7p
Publication Year :
2024

Abstract

Quantum well nanolasers usually show single‐mode lasing, as gain saturation suppresses emissions in other modes. In contrast, for whispering gallery mode microdisk lasers with GaN quantum wells as active material, above threshold multimode laser emission is observed. This intriguing emission feature is manifested in the fact that several modes simultaneously show the characteristic kink in the input–output curve at the onset of lasing. A quantum theory for nanolasers is used to support the experimental finding and to analyze this behavior in the presence of gain saturation. Coupling effects between neighboring modes are identified as the origin of multimode lasing, which initiate photon exchange between modes via population pulsations similar to classical wave‐mixing effects. A reduction of this type of mode coupling with increasing mode spacing is demonstrated. The results can pave the way for multimode application of nanolasers in integrated photonic circuits. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
18638880
Volume :
18
Issue :
10
Database :
Complementary Index
Journal :
Laser & Photonics Reviews
Publication Type :
Academic Journal
Accession number :
180279340
Full Text :
https://doi.org/10.1002/lpor.202400221