Huge binding energy of localized biexcitons in CdS/ZnS quantum structures

Woggon, U., Hild, K., Gindele, F., Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Hetterich, M., Grün, M. and Klingshirn, C. 2000. Huge binding energy of localized biexcitons in CdS/ZnS quantum structures. Physical Review B 61 (19) , pp. 12632-12635. 10.1103/PhysRevB.61.12632

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Abstract

Biexcitons localized in ultrathin CdS/ZnS single quantum wells with fluctuating well thicknesses are investigated by two-photon absorption and single-exciton spectroscopy. For the binding energy of the confined biexciton, a value of ΔEB=38 meV is determined. Comparing ΔEB with the CdS bulk exciton binding energy ERyd=28 meV, the largest known ratio ΔEB/ERyd=1.4 is found. Additionally, a strong enhancement of exchange splitting effects is observed resulting in a linearly polarized exciton doublet and a single, linearly polarized biexciton line.

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:	28 Oct 2022 08:38
URI:	https://orca.cardiff.ac.uk/id/eprint/71566

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