Excitonic dephasing effects studied by time- and phase-resolved secondary emission

Stefan Haacke; S. Schaer; Benoit Deveaud; V. Savona

doi:10.1117/12.349307

24 May 1999 Excitonic dephasing effects studied by time- and phase-resolved secondary emission

Stefan Haacke, S. Schaer, Benoit Deveaud, V. Savona

Proceedings Volume 3624, Ultrafast Phenomena in Semiconductors III; (1999) https://doi.org/10.1117/12.349307
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

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.

Citation Download Citation

Stefan Haacke, S. Schaer, Benoit Deveaud, and V. Savona "Excitonic dephasing effects studied by time- and phase-resolved secondary emission", Proc. SPIE 3624, Ultrafast Phenomena in Semiconductors III, (24 May 1999); https://doi.org/10.1117/12.349307

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