Long-wavelength InAs/InAlGaAs quantum dot microdisk lasers on InP (001) substrate

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:	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:	15 Mar 2024 02:30
URI:	https://orca.cardiff.ac.uk/id/eprint/157773

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