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

Title data

Axt, Vollrath M. ; Kuhn, Tilmann ; Vagov, Alexei ; Borri, P. ; Langbein, W. ; Woggon, U.:
Observation of an unusual temperature dependence of the initial decoherence time in quantum dots.
In: Physica Status Solidi C. Vol. 2 (2005) Issue 8 . - pp. 3167-3170.
ISSN 1610-1642
DOI: https://doi.org/10.1002/pssc.200460779

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

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. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; generating functions; non-linear optics; ultrafast dynamics; pure dephasing; phonons; analytical solutions; phonon sidebands; excitons; four-wave mixing; polaron formation; Non-perturbative solution; decoherence
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Oct 2017 10:52
Last Modified: 23 Oct 2017 10:52
URI: https://eref.uni-bayreuth.de/id/eprint/40119