Back action of nonequilibrium phonons on the optically induced dynamics in semiconductor quantum dots

Titelangaben

Krügel, A. ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Back action of nonequilibrium phonons on the optically induced dynamics in semiconductor quantum dots.
In: Physical Review B. Bd. 73 (2006) Heft 3 . - 035302.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.73.035302

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Abstract

The dynamics in a GaAs-type quantum dot induced by excitation with Gaussian laser pulses of arbitrary duration are calculated in the density matrix formalism using the correlation expansion. In particular the back-action of nonequilibrium phonons, i.e., the coherent phonon amplitude and the nonequilibrium phonon occupation, on the electronic two-level system are studied. We find that especially for long pulses and low temperatures nonequilibrium phonons play an important role and cannot be neglected.