Photoluminescence studies of individual and few GaSb/GaAs quantum rings

Young, M.P., Woodhead, C.S. ORCID: https://orcid.org/0000-0003-1342-0744, 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. 10.1063/1.4902177

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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

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Institute of Physics Publising LLC
ISSN:	2158-3226
Date of First Compliant Deposit:	4 June 2021
Date of Acceptance:	7 November 2014
Last Modified:	05 May 2023 02:16
URI:	https://orca.cardiff.ac.uk/id/eprint/141245

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