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1.3 µm InAs/GaAs quantum‐dot lasers with p‐type, n‐type, and co‐doped modulation

Deng, Huiwen, Park, Jae-Seong, Yu, Xuezhe, Liu, Zizhuo, Jia, Hui, Zeng, Haotian, Yang, Junjie, Pan, Shujie, Chen, Siming, Seeds, Alwyn, Tang, Mingchu, Smowton, Peter ORCID: https://orcid.org/0000-0002-9105-4842 and Liu, Huiyun 2024. 1.3 µm InAs/GaAs quantum‐dot lasers with p‐type, n‐type, and co‐doped modulation. Advanced Physics Research 3 (10) , 2400045. 10.1002/apxr.202400045

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Abstract

To further enhance the performance and understand the mechanism of InAs quantum dot (QD) laser under high temperature, both theoretically and experimentally it is investigated, the effects of the technique of the combination of direct n-type doping and modulation p-type doping, namely co-doping, in the active region for a wide temperature range over 165 °C. Through the comparison of co-doped, modulation p-type doped, direct n-type doped, and undoped QD lasers, it reveals that the co-doping technique provides a significantly reduced threshold current density across the whole temperature range and robust high-temperature operation. Furthermore, it is also observed that the effectiveness of co-doping in suppressing round-state quenching is comparable to that of p-doping. The improvements in the doping strategies are also revealed through the rate equation simulation of the lasers.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Wiley
ISSN: 2751-1200
Date of First Compliant Deposit: 14 June 2024
Date of Acceptance: 13 June 2024
Last Modified: 05 Nov 2024 15:30
URI: https://orca.cardiff.ac.uk/id/eprint/169825

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