Fletcher, P., Martínez de Arriba, G., Tian, Y. et al. (5 more authors) (2022) Optical characterisation of InGaN-based microdisk arrays with nanoporous GaN/GaN DBRs. Journal of Physics D: Applied Physics, 55 (46). 464001. ISSN 0022-3727
Abstract
Optically pumped whispering gallery mode (WGM) lasing has been observed in many freestanding microdisk structures. Dry etching is normally used to fabricate the microdisks, which causes severe sidewall damage, resulting in degradation of lasing performance, especially for ultra-small electrically-injected devices. In this paper, we demonstrate high quality microdisk cavities with 3.5 µm diameter, by combining a selective overgrowth approach and an epitaxial lattice-matched distributed Bragg reflector (DBR), topped with a highly reflective (>99%) dielectric DBR. InGaN polaritons are found to occur in the high-quality microcavities. WGM modes are measured, with the positions in good agreement with finite difference time domain simulations. Furthermore, lasing behaviour is observed with a threshold at 410 µW and a dominant mode at 488 nm.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license (https://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Keywords: | InGaN; microdisk; nanoporous; optical characterisation; DBR |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/M015181/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/P006361/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/P006973/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Oct 2022 12:23 |
Last Modified: | 12 Oct 2022 14:25 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1361-6463/ac8fa0 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:191365 |
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