Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Muljarov, Egor A. ORCID: https://orcid.org/0000-0002-2878-4148 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 |
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 |
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Date Type: | Publication |
Status: | Published |
Schools: | Biosciences Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Publisher: | Wiley-Blackwell |
ISSN: | 0370-1972 |
Last Modified: | 10 Nov 2023 12:45 |
URI: | https://orca.cardiff.ac.uk/id/eprint/48485 |
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