Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

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:, 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

[thumbnail of APL QD microdisk laser on InP.pdf]
PDF - Published Version
Download (3MB) | Preview


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

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics