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Radiative coupling of excitons in ZnSe double quantum wells

Langbein, Wolfgang Werner, 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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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: 04 Jun 2017 08:00

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