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Proceedings Paper

Excitonic dephasing effects studied by time- and phase-resolved secondary emission
Author(s): Stefan Haacke; S. Schaer; Benoit Deveaud; V. Savona
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Paper Abstract

The initial dynamics of resonantly excited secondary emission from quantum wells are dominated by Rayleigh scattering due to excitons localized in the disordered quantum well potential. We show experimentally and theoretically how the temporal shape of the early response is related to details of the 2D disorder potential, and we determine the mean amplitude of the fluctuations and the correlation length. Spectral interferometry performed with a single speckle allows to investigate the phase of the electric field emitted by the ensemble of excitons. We find evidence for a correlation between the degree of localization and the fluctuations of the phase as a function of energy.

Paper Details

Date Published: 24 May 1999
PDF: 7 pages
Proc. SPIE 3624, Ultrafast Phenomena in Semiconductors III, (24 May 1999); doi: 10.1117/12.349307
Show Author Affiliations
Stefan Haacke, Swiss Federal Institute of Technology (Switzerland)
S. Schaer, Swiss Federal Institute of Technology (Switzerland)
Benoit Deveaud, Swiss Federal Institute of Technology (Switzerland)
V. Savona, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 3624:
Ultrafast Phenomena in Semiconductors III
Kong-Thon F. Tsen, Editor(s)

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