Interaction-induced effects in the nonlinear coherent response of quantum-well excitons

Wagner, H., Schätz, A., Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Hvam, J. and Smirl, Arthur 1999. Interaction-induced effects in the nonlinear coherent response of quantum-well excitons. Physical Review B 60 (7) , pp. 4454-4457. 10.1103/PhysRevB.60.4454

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Abstract

Interaction-induced processes are studied using the third-order nonlinear polarization created in polarization-dependent four-wave-mixing experiments (FWM) on a ZnSe single quantum well. We discuss their influence by a comparison of the experimental FWM with calculations based on extended optical Bloch equations including local-field effects, excitation-induced dephasing, and biexciton formation. The investigations show that, for copolarized input fields, excitation-induced dephasing is the dominant FWM mechanism, followed by the conventional density-grating FWM process, biexcitonic contributions, and local-field effects. For cross-linear polarized input fields the excitation-induced dephasing mechanism is canceled so that the conventional density-grating FWM process and biexcitonic contributions are dominating.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	0163-1829
Last Modified:	28 Oct 2022 08:40
URI:	https://orca.cardiff.ac.uk/id/eprint/71713

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