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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, Langbein, Wolfgang 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: 13 May 2019 20:38
URI: http://orca-mwe.cf.ac.uk/id/eprint/48808

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