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Vagov, Alexei ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Non-perturbative treatment of quantum dots coupled to light and phonons.
In: Physica E: Low-dimensional Systems and Nanostructures.
Bd. 17
(2003)
.
- S. 11-14.
ISSN 1386-9477
DOI: https://doi.org/10.1016/S1386-9477(02)00704-X
Angaben zu Projekten
| Projektfinanzierung: |
Supported by the European Commission within the Future and Emerging Technologies (FET) project “Semiconductor-based implementation of quantum information devices” |
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Abstract
We present an exact solution for the dynamics of a quantum dot (QD) coupled to phonons and excited by ultra-short light pulses. The solution is non-perturbative with respect to both carrier-phonon and carrier-light coupling, and accounts for an arbitrary number of pulses. Explicit expressions for the one and two pulse solutions are used to obtain the non-linear four-wave-mixing optical response by a single QD as well as by disordered QD arrays. Phonon emission by the excited QD is shown to be qualitatively different from that in the phonon assisted carrier relaxation.