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

Wagner, H., Schätz, A., Langbein, Wolfgang Werner, 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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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: 04 Jun 2017 08:01

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