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Nonmonotonic field dependence of damping and reappearance of Rabi oscillations in quantum dots.

Vagov, A. and Croitoru, M. D. and Axt, V. M. and Kuhn, T. and Peeters, F. M. (2007) Nonmonotonic field dependence of damping and reappearance of Rabi oscillations in quantum dots. Physical Review Letters, 98 (22). p. 227403. ISSN 1079-7114

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Abstract

The dynamics of strongly confined laser driven semiconductor quantum dots coupled to phonons is studied theoretically by calculating the time evolution of the reduced density matrix using a numerical path integral method. We explore the cases of long pulses, strong dot-phonon and dot-laser coupling, and high temperatures, which, up to now, have been inaccessible. We find that the phonon-induced damping of Rabi rotations is a nonmonotonic function of the laser field that is increasing at low fields and decreasing at high fields. This results in a reappearance of Rabi rotations at high fields. This phenomenon is of a general nature which occurs for all temperatures and carrier-phonon coupling strengths.

Item Type: Article
Journal or Publication Title: Physical Review Letters
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 18695
Deposited By: ep_ss_importer
Deposited On: 28 Oct 2008 11:48
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:20
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18695

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