Dresden 2003 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 49: Poster II

HL 49.71: Poster

Donnerstag, 27. März 2003, 16:30–19:00, HSZ/P2

Phonon-induced damping of Rabi-oscillations and self induced transparency in semiconductor quantum dots — •Jens Förstner, Carsten Weber, Juliane Danckwerts, and Andreas Knorr — Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin

The acoustic and optical phonon-induced dephasing dynamics in semiconductor quantum dots is modelled in a quantum kinetic density matrix framework. We use a perturbative approach to include coherences with up to two phonons allowing arbitrary pulse lengths and strengths, and compare our results to analytical solutions, which can be derived for excitation with delta pulses. We study phonon-induced damping of the Rabi oscillations for different pulse lengths and strengths for GaAs type quantum dots. Additionally, by solving the Maxwell equations together with the material system, we investigate nonlinear propagation of optical pulses and observe features like damped self induced transparency.