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Dephasing of excited-state excitons in InGaAs quantum dots

Borri, Paola, Langbein, Wolfgang Werner, Muljarov, Egor A. and Zimmermann, R. 2006. Dephasing of excited-state excitons in InGaAs quantum dots. physica status solidi (b) 243 (15) , pp. 3890-3894. 10.1002/pssb.200671516

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Abstract

We measure the dephasing time of the first optically-active excited-state excitonic transition in strongly confined InGaAs quantum dots using transient four-wave mixing. The optically-driven excited-state polarization shows a bi-exponential decay with a significant fraction of the probed excited states exhibiting a very long dephasing time, in the nanosecond range at 10 K. The full time-dependent four-wave mixing polarization is microscopically calculated by taking into account both virtual and real acoustic phonon-assisted transitions. The bi-exponential decay is qualitatively explained by a model of two-bright excitonic excited states non-degenerate in the absence of in-plane cylindrical symmetry. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Wiley-Blackwell
ISSN: 0370-1972
Last Modified: 02 May 2019 11:14
URI: http://orca.cf.ac.uk/id/eprint/48485

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