Binding-energy distribution and dephasing of localized biexcitons

Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, 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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Abstract

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:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	0163-1829
Last Modified:	28 Oct 2022 08:46
URI:	https://orca.cardiff.ac.uk/id/eprint/72113

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