Butler, I.M.E., Li, W., Sobhani, S.A., Babazadeh, N., Ross, I.M., Nishi, K., Takemasa, K., Sugawara, M., Childs, D.T.D. and Hogg, R.A. (2018) Size Anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers. Applied Physics Letters, 113(1), 012105. (doi: 10.1063/1.5021774)
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Abstract
We describe a high angle annular dark field scanning transmission electron microscopy (HAADF STEM) study of self-assembled InAs-GaAs quantum dot (QD) laser sample, providing insight into the micro-structure of the QD ensemble. A size distribution anisotropy of the QDs is observed in the two orthogonal (110) planes, this structural information is used to develop a density of states model for the QD ensemble which is shown to be in strong agreement with a range of optical spectroscopic measurements. This link between micro-structure and optical properties allow routes to QD device simulation. We go on to discuss how changes to the micro-structure would affect the density of states and hence laser performance.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Babazadeh, Dr Nasser and Hogg, Professor Richard and Butler, Iain and Childs, Dr David |
Authors: | Butler, I.M.E., Li, W., Sobhani, S.A., Babazadeh, N., Ross, I.M., Nishi, K., Takemasa, K., Sugawara, M., Childs, D.T.D., and Hogg, R.A. |
College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Applied Physics Letters |
Publisher: | AIP Publishing |
ISSN: | 0003-6951 |
ISSN (Online): | 1077-3118 |
Published Online: | 05 July 2018 |
Copyright Holders: | Copyright © 2018 The Authors |
First Published: | First published in Applied Physics Letters 113(1):012105 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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