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Vagov, Alexei ; Croitoru, Mikhail D. ; Axt, Vollrath Martin ; Kuhn, Tilmann ; Peeters, F. M.:
Nonmonotonic Field Dependence of Damping and Reappearance of Rabi Oscillations in Quantum Dots.
In: Physical Review Letters.
Bd. 98
(2007)
Heft 22
.
- 227403.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.98.227403
Angaben zu Projekten
| Projektfinanzierung: |
Belgian Science Policy,
ESF-AQDJJ network,
EU Network of Excellence SANDiE and
Marie-Curie excellence Grant No. NEXT-CT-2005-023778 |
|---|
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.