Jia, Hui, Yu, Xuezhe, Zhou, Taojie, Dear, Calum, Yuan, Jiajing, Tang, Mingchu, Yan, Zhao, Ratiu, Bogdan-Petrin, Li, Qiang  ORCID: https://orcid.org/0000-0002-5257-7704, Seeds, Alwyn, Liu, Huiyun and Chen, Siming
2023.
Long-wavelength InAs/InAlGaAs quantum dot microdisk lasers on InP (001) substrate.
Applied Physics Letters
122
(11)
, 111108.
10.1063/5.0142391
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Abstract
In this Letter, we present long-wavelength microdisk lasers based on five stacks of self-assembled InAs/InAlGaAs quantum dots as the active medium, which were grown on InP (001) substrate by solid-source molecular beam epitaxy. The 8.4-μm-diameter quantum dot microdisk laser is operated at room temperature under pulsed optically pumping conditions. Multi-wavelength lasing emissions at ∼1.6 μm were achieved with a low lasing threshold of 30 μW and a quality factor of ∼1336. The lasing behavior was verified by the “S” shape L–L curve, linewidth narrowing effect, and strong speckle patterns of the collected near field intensity profile. The demonstrated long-wavelength lasers with low threshold and ultracompact footprint can find potential applications in integrated gas detection and highly localized label-free biological and biochemical sensing.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Publisher: | American Institute of Physics |
| ISSN: | 0003-6951 |
| Funders: | EPSRC |
| Date of First Compliant Deposit: | 16 March 2023 |
| Date of Acceptance: | 27 February 2023 |
| Last Modified: | 29 Dec 2024 14:51 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/157773 |
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