Dresden 2009 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 48: Poster 2
HL 48.60: Poster
Thursday, March 26, 2009, 15:00–17:30, P2
Theory of Time-resolved Raman and Fluorescence Emission of Semiconductor Quantum Dots — •Julia Kabuss1, Stefan Werner2, Axel Hoffmann2, Andreas Knorr1, and Marten Richter1 — 1Institut für Theoretische Physik, Technische Universität Berlin — 2Institut für Festkörperphysik, Technische Universität Berlin
Resonant light scattering experiments provide information about the optical and electronic properties of semiconductor quantum dots. We develope a quantized description for the spontaneous light emission of a coupled phonon-semiconductor quantum dot system after resonant optical excitation. A perturbative approach to the density matrix leads to an analytic expression for the quasi-stationary spectrum, while the time-dependent spectrum is computed numerically. Our results allow the simultaneous discussion of Raman scattering and Fluorescence. They can be discriminated from each other by their spectral properties and their decay times respectively as both processes occur simultaneously in a resonant scattering experiment. Our results are compared to experimental data.