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

Authors
Corfdir, P 
Lewis, RB 
Marquardt, O 
Grandal, J 

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Article
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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.

Publication Date
2016
Online Publication Date
2016-08-26
Acceptance Date
2016-08-03
Keywords
5108 Quantum Physics, 51 Physical Sciences
Journal Title
Applied Physics Letters
Journal ISSN
0003-6951
1077-3118
Volume Title
109
Publisher
AIP Publishing
Rights
All rights reserved
Sponsorship
EPSRC (EP/C009290/1)
Fonds National Suisse de la Recherche Scientifique Project No. 161032. Deutsche Forschungsgemeinschaft (Grant No. Ge2224/2-2) EPSRC (Grant No. EP/C009200/01)