Dephasing and interaction of excitons in CdSe/ZnSe islands

Wagner, H. P., Tranitz, H. -P., Preis, H., Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023 and Hvam, J.M. 2000. Dephasing and interaction of excitons in CdSe/ZnSe islands. Journal of Crystal Growth 214 (21) , pp. 747-751. 10.1016/S0022-0248(00)00192-5

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Abstract

The dephasing of excitons in self-organized CdSe/ZnSe islands grown by molecular-beam epitaxy is investigated using spectrally resolved four-wave mixing. A distribution of dephasing times is observed, indicating the existence of localized excitons with different relaxation times at comparable transition energies. Polarization-dependent measurements identify the formation of biexcitons. The observed large biexciton binding energy of 22meV increases with decreasing exciton energy, which is attributed to an increasing three-dimensional confinement.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Elsevier
ISSN:	0022-0248
Last Modified:	28 Oct 2022 08:38
URI:	https://orca.cardiff.ac.uk/id/eprint/71560

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