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Coherent phenomena and interaction of excitons in wide ZnSe/Zn1?xMgxSe single quantum wells

Schätz, A., Wagner, H.P., Maier, R., Preis, H., Frey, T., Reisinger, T., Gebhardt, W., Langbein, Wolfgang Werner and Hvam, J.M. 1998. Coherent phenomena and interaction of excitons in wide ZnSe/Zn1?xMgxSe single quantum wells. Journal of Crystal Growth 184 (18) , pp. 672-675. 10.1016/S0022-0248(98)80140-1

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Abstract

We investigate the transient four-wave mixing (FWM) response of wide ZnSe/Zn 1- xMg xSe single quantum wells in a two-beam self-diffraction configuration. The spectrally resolved FWM signals show excitonic transitions which are essentially homogeneously broadened, and show dephasing times between 1 and 2 ps at a lattice temperature of 10 K. Simultaneous excitation of several exciton states leads to pronounced quantum beats in the FWM signal. The formation of heavy-hole biexcitons with binding energies of E bXX = 3.5 ± 0.5 meV is identified by polarization-dependent measurements. These measurements also indicate that excitation-induced dephasing gives the main contribution to the FWM process.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Elsevier
ISSN: 0022-0248
Last Modified: 04 Jun 2017 08:01
URI: http://orca.cf.ac.uk/id/eprint/71763

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