Photoluminescence studies of individual and few GaSb/GaAs quantum rings

Young, M. P. and Woodhead, C. S. and Roberts, Jonny and Noori, Y. J. and Noble, M. T. and Krier, A. and Smakman, E. P. and Koenraad, P. M. and Hayne, M. and Young, R. J. (2014) Photoluminescence studies of individual and few GaSb/GaAs quantum rings. AIP Advances, 4 (11): 117127.

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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

Item Type:
Journal Article
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AIP Advances
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© © 2014 Author(s).. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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?? physics and astronomy(all) ??
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Deposited On:
21 Nov 2014 11:09
Last Modified:
19 May 2024 00:26