Photoluminescence studies of individual and few GaSb/GaAs quantum rings
Photoluminescence studies of individual and few GaSb/GaAs quantum rings
We present optical studies of individual and few GaSb quantum rings embedded in a GaAs matrix. Contrary to expectation for type-II confinement, we measure rich spectra containing sharp lines. These lines originate from excitonic recombination and are observed to have resolution-limited full-width at half maximum of 200 μeV. The detail provided by these measurements allows the characteristic type-II blueshift, observed with increasing excitation power, to be studied at the level of individual nanostructures. These findings are in agreement with hole-charging being the origin of the observed blueshift.
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Young, M.P.
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Woodhead, C.S.
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Roberts, J.
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Noori, Y.J.
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Noble, M.T.
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Krier, A.
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Smakman, E.P.
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Koenraad, P.M.
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Hayne, M.
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Young, R.J.
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November 2014
Young, M.P.
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Woodhead, C.S.
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Roberts, J.
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Noori, Y.J.
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Noble, M.T.
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Krier, A.
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Smakman, E.P.
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Koenraad, P.M.
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Hayne, M.
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Young, R.J.
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Young, M.P., Woodhead, C.S., Roberts, J., Noori, Y.J., Noble, M.T., Krier, A., Smakman, E.P., Koenraad, P.M., Hayne, M. and Young, R.J.
(2014)
Photoluminescence studies of individual and few GaSb/GaAs quantum rings.
AIP Advances, 4 (11), , [117127].
(doi:10.1063/1.4902177).
Abstract
We present optical studies of individual and few GaSb quantum rings embedded in a GaAs matrix. Contrary to expectation for type-II confinement, we measure rich spectra containing sharp lines. These lines originate from excitonic recombination and are observed to have resolution-limited full-width at half maximum of 200 μeV. The detail provided by these measurements allows the characteristic type-II blueshift, observed with increasing excitation power, to be studied at the level of individual nanostructures. These findings are in agreement with hole-charging being the origin of the observed blueshift.
Text
1.4902177
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More information
Accepted/In Press date: November 2014
e-pub ahead of print date: 17 November 2014
Published date: November 2014
Identifiers
Local EPrints ID: 425671
URI: http://eprints.soton.ac.uk/id/eprint/425671
ISSN: 2158-3226
PURE UUID: c5d352b2-5d33-48f4-af41-d9a7deb1d719
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Date deposited: 31 Oct 2018 17:30
Last modified: 16 Mar 2024 04:37
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Contributors
Author:
M.P. Young
Author:
C.S. Woodhead
Author:
J. Roberts
Author:
Y.J. Noori
Author:
M.T. Noble
Author:
A. Krier
Author:
E.P. Smakman
Author:
P.M. Koenraad
Author:
M. Hayne
Author:
R.J. Young
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