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Binding-energy distribution and dephasing of localized biexcitons

Langbein, Wolfgang Werner, Hvam, J. M., Umlauff, M., Kalt, H., Jobst, B. and Hommel, D. 1997. Binding-energy distribution and dephasing of localized biexcitons. Physical Review B 55 (12) , R7383. 10.1103/PhysRevB.55.R7383

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We report on the binding energy and dephasing of localized biexciton states in narrow ZnSe multiple quantum wells. The measured binding-energy distribution of the localized biexcitons shows a width of 2.2 meV centered at 8.5 meV, and is fairly independent of the exciton localization energy. In four-wave mixing, the biexciton photon echo decays fast and nonexponentially. This behavior results from the inhomogeneous broadening of the biexciton binding energy, as we show by a comparison with an analytical model calculation. The fast decay is thus not related to a fast microscopic biexciton dephasing.

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 08:02

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