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HL: Halbleiterphysik

HL 50: Poster II

HL 50.67: Poster

Donnerstag, 30. März 2006, 16:30–19:00, P3

Coherence properties of the resonance fluorescence from GaAs Quantum Wells — •Gerolf Burau, Birger Seifert, and Heinrich Stolz — Institut für Physik, Universität Rostock, 18051 Rostock

We study the spectral coherence properties of the resonance fluorescence from excitons in GaAs quantum wells under coherent resonant excitation. The distinction between the coherent and the incoherent component of the radiation emitted from excitons is experimentally challenging. Therefore a new setup for spectral speckle analysis has been developed for precise measurement of the secondary emission intensity distribution. We considerably improved the quality of the quantitative analyzed speckle distribution due to the improved optical imaging and the higher spectral resolution. A single frequency laser with 4 neV (1 Mhz) bandwidth was used for excitation.