Jia, H;
Yu, X;
Zhou, T;
Dear, C;
Yuan, J;
Tang, M;
Yan, Z;
... Chen, S; + view all
(2023)
Long-wavelength InAs/InAlGaAs quantum dot microdisk lasers on InP (001) substrate.
Applied Physics Letters
, 122
, Article 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.
| Type: | Article |
|---|---|
| Title: | Long-wavelength InAs/InAlGaAs quantum dot microdisk lasers on InP (001) substrate |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0142391 |
| Publisher version: | https://doi.org/10.1063/5.0142391 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10167443 |
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