Radiative coupling of excitons in ZnSe double quantum wells

Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Mann, Ch., Woggon, U., Klude, M. and Hommel, D. 2002. Radiative coupling of excitons in ZnSe double quantum wells. physica status solidi (a) 190 (3) , pp. 861-866. 10.1002/1521-396X(200204)190:3<861::AID-PSSA861>3.0.CO;2-B

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Abstract

The radiative coupling between heavy-hole excitons in ZnSe double quantum wells is investigated experimentally and theoretically. The double quantum wells have a distance of half or quarter the wavelength (λ/2, λ/4) of the light resonant to the excitonic transition. The exciton energy splitting is tuned via a quantum well thickness gradient to control the radiative coupling. While in the λ/2 case a superradiant mode is observed, in the λ/4 case an anti-splitting is found. The results are compared with theoretical predictions using transfer matrix calculations. The residual disorder-induced inhomogeneous broadening, which is smaller than the radiative broadening of a single quantum well, significantly reduces the radiative coupling effects.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Wiley
ISSN:	1862-6319
Date of Acceptance:	September 2001
Last Modified:	28 Oct 2022 08:36
URI:	https://orca.cardiff.ac.uk/id/eprint/71429

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