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Nonlinear response of localized excitons: effects of the excitation-induced dephasing

Borri, Paola, Langbein, Wolfgang Werner, Birkedal, D., Lyssenko, V. G. and Hvam, J. M. 1997. Nonlinear response of localized excitons: effects of the excitation-induced dephasing. Physica Status Solidi (a) 164 (1) , pp. 61-65. 10.1002/1521-396X(199711)164:1<61::AID-PSSA61>3.0.CO;2-R

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The polarization dependence of the ultrafast nonlinear response of localized excitons in GaAs/AlGaAs quantum wells has been investigated by spectrally resolved, transient four-wave mixing. The role of the excitation-induced dephasing in the delay dependence of the signal is discussed in detail. In particular, we show experimentally that the excitation-induced dephasing gives rise to a photon echo in inhomogeneous systems. We develop a simple analytical model for the delay dependence of the signal, which enables us to deduce the dephasing time from the four-wave mixing decay.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Wiley
ISSN: 0031-8965
Last Modified: 15 Jul 2020 14:22

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