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Inversion of the exciton fine structure splitting in quantum dots

Young, R. J. and Stevenson, R. M. and Shields, A. J. and Atkinson, P. and Cooper, K. and Ritchie, D. A. and Groom, K. M. and Tartakovskii, A. I. and Skolnick, M. S. (2006) Inversion of the exciton fine structure splitting in quantum dots. Physica E: Low-dimensional Systems and Nanostructures, 32 (1-2). pp. 97-100. ISSN 1386-9477

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Abstract

The fine structure splitting of exciton state was measured for a large number of single InAs quantum dots in GaAs. It is shown to decrease as the exciton confinement decreases, crucially passing through zero and changing sign. Degeneracy of the exciton spin states is an important step to producing entangled photons from the biexciton cascade. Thermal annealing reduces the exciton confinement and thereby increases the number of degenerate dots in a particular sample. (c) 2006 Elsevier B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Physica E: Low-dimensional Systems and Nanostructures
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 54925
Deposited By: ep_importer_pure
Deposited On: 07 Jun 2012 12:35
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:37
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/54925

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