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Observation of an unusual temperature dependence of the initial decoherence time in quantum dots

Axt, V. M., Kuhn, T., Vagov, A., Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang ORCID: https://orcid.org/0000-0001-9786-1023 and Woggon, U. 2005. Observation of an unusual temperature dependence of the initial decoherence time in quantum dots. Physica Status Solidi C: Current Topics in Solid State Physics 2 (8) , pp. 3167-3170. 10.1002/pssc.200460779

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Abstract

We report on four-wave-mixing experiments in self-assembled InAs/GaAs quantum dots and compare with a theory that accounts for the pure-dephasing induced by acoustic phonons. The measurements demonstrate an unusual non-monotonous temperature dependence of the initial decoherence time in full agreement with previous theoretical predictions made on the basis of a model that concentrates on the lowest electronic states. For samples exhibiting strong electronic confinement this model even yields a good quantitative agreement with the experiments while for less confined samples there are some systematic deviations although many qualitative features are still well reproduced by the model.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Publisher: Wiley
ISSN: 1610-1634
Last Modified: 10 Nov 2022 13:36
URI: https://orca.cardiff.ac.uk/id/eprint/48808

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