Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers

I. M.E. Butler; W. Li; S. A. Sobhani; N. Babazadeh; I. M. Ross; K. Nishi; K. Takemasa; M. Sugawara; D. T.D. Childs; R. A. Hogg

doi:10.1063/1.5021774

Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers

I. M.E. Butler, W. Li, S. A. Sobhani, N. Babazadeh, I. M. Ross, K. Nishi, K. Takemasa, M. Sugawara, D. T.D. Childs, R. A. Hogg

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Abstract

We describe a high angle annular dark field scanning transmission electron microscopy study of a 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, and 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 the micro-structure and optical properties allows 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.

Original language	English
Article number	012105
Journal	Applied Physics Letters
Volume	113
Issue number	1
DOIs	https://doi.org/10.1063/1.5021774
Publication status	Published - 05 Jul 2018

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers
Copyright 2018 AIP. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 742 KBLicence: Unspecified

Structural and Opto-Electronic Properties of GaAs and InP Based Quantum Dot Lasers
Butler, I. (Author), Hogg, R. (Supervisor), Childs, D. (Supervisor) & Bowman, R. (Supervisor), Dec 2020
Student thesis: Doctoral Thesis › Doctor of Philosophy

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abstract = "We describe a high angle annular dark field scanning transmission electron microscopy study of a 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, and 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 the micro-structure and optical properties allows 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.",

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AU - Butler, I. M.E.

AU - Li, W.

AU - Sobhani, S. A.

AU - Babazadeh, N.

AU - Ross, I. M.

AU - Nishi, K.

AU - Takemasa, K.

AU - Sugawara, M.

AU - Childs, D. T.D.

AU - Hogg, R. A.

PY - 2018/7/5

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AB - We describe a high angle annular dark field scanning transmission electron microscopy study of a 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, and 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 the micro-structure and optical properties allows 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.

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DO - 10.1063/1.5021774

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers

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Structural and Opto-Electronic Properties of GaAs and InP Based Quantum Dot Lasers

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