Published 2024
| Version v1
Journal article
Multimode Emission in GaN Microdisk Lasers
Contributors
Others:
- Universität Bremen
- Technical University of Berlin / Technische Universität Berlin (TU)
- Centre de recherche sur l'hétéroepitaxie et ses applications (CRHEA) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UniCA)
- Paul-Drude-Institut für Festkörperelektronik (PDI)
- ANR-17-CE08-0043,MILAGAN,Laser microdisque en (Al,Ga,In)-N injecté électriquement(2017)
- ANR-11-LABX-0014,GANEX,Réseau national sur GaN(2011)
Description
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
International audienceAdditional details
Identifiers
- URL
- https://hal.science/hal-04570271
- URN
- urn:oai:HAL:hal-04570271v1
Origin repository
- Origin repository
- UNICA