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

Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, 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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Abstract

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:	25 Oct 2022 09:42
URI:	https://orca.cardiff.ac.uk/id/eprint/59713

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