Exciton recombination at crystal-phase quantum rings in GaAs/In<inf>x</inf>Ga<inf>1-x</inf>As core/multishell nanowires

Corfdir, P; Lewis, RB; Marquardt, O; Küpers, H; Grandal, J; Dimakis, E; Trampert, A; Geelhaar, L; Brandt, Oleg; Phillips, Richard

View / Open Files

Published version (PDF, 2Mb)

Authors

Corfdir, P

Lewis, RB

Marquardt, O

Küpers, H

Grandal, J

Dimakis, E

Trampert, A

Publication Date

2016-08-22

Journal Title

Applied Physics Letters

ISSN

0003-6951

Publisher

AIP Publishing

Volume

109

Issue

Type

Article

Metadata

Show full item record

Citation

Corfdir, P., Lewis, R., Marquardt, O., Küpers, H., Grandal, J., Dimakis, E., Trampert, A., et al. (2016). Exciton recombination at crystal-phase quantum rings in GaAs/In<inf>x</inf>Ga<inf>1-x</inf>As core/multishell nanowires. Applied Physics Letters, 109 (8) https://doi.org/10.1063/1.4961245

Abstract

© 2016 Author(s). We study the optical properties of coaxial GaAs/InxGa1-xAs core/multishell nanowires with x between 0.2 and 0.4 at 10 K. The evolution of the photoluminescence energy of the InxGa1-xAs quantum well shell with x and shell thickness agrees with the result of 8-band k·p calculations, demonstrating that the shell growth is pseudomorphic. At low excitation power, the photoluminescence from the shell is dominated by the recombination of exciton states deeply localized within the shell. We show that these states are associated with crystal-phase quantum rings that form at polytype segments of the InxGa1-xAs quantum well shell.

Sponsorship

Fonds National Suisse de la Recherche Scientifique Project No. 161032. Deutsche Forschungsgemeinschaft (Grant No. Ge2224/2-2) EPSRC (Grant No. EP/C009200/01)

Funder references

EPSRC (EP/C009290/1)

Identifiers

External DOI: https://doi.org/10.1063/1.4961245

This record's URL: https://www.repository.cam.ac.uk/handle/1810/285512

Rights

Licence:

http://www.rioxx.net/licenses/all-rights-reserved