Li, Z., Wang, L., Jiu, L. et al. (6 more authors) (2017) Optical investigation of semi-polar (11-22) Al<inf>x</inf>Ga<inf>1-x</inf>N with high Al composition. Applied Physics Letters, 110 (9). ISSN 0003-6951
Abstract
© 2017 Author(s).Exciton localization generally disturbs uniform population inversion, leading to an increase in the threshold current for lasing. High Al content AlGaN is required for the fabrication of deep ultra-violet (DUV) laser diodes (LDs), and this also generates exciton localization. Temperature-dependent photoluminescence and room temperature cathodoluminescence measurements have been performed on high quality semi-polar (11-22) AlxGa1-xN alloys with high Al composition ranging from 0.37 to 0.56 in order to systematically study the optical properties (in particular, exciton localization) of both the near-band-edge emission and the basal-plane stacking faults related emission, demonstrating different behaviours. Further comparison with the exciton localization of their c-plane counterparts has been performed, exhibiting that the exciton localization in semi-polar (11-22) AlGaN is much smaller than that in c-plane AlGaN. As a consequence, semi-polar (11-22) AlGaN demonstrates a greater potential than its c-plane counterpart in terms of the growth of DUV LDs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Author(s). This is an author produced version of a paper subsequently published in Applied Physics Letters. Uploaded in accordance with the publisher's self-archiving policy. |
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 (EPSRC) EP/M003132/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/M015181/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 15 Mar 2017 10:51 |
Last Modified: | 07 Nov 2017 14:28 |
Published Version: | https://doi.org/10.1063/1.4977428 |
Status: | Published |
Publisher: | AIP Publishing |
Refereed: | Yes |
Identification Number: | 10.1063/1.4977428 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:113574 |