Exciton–phonon interaction and energy relaxation in ZnSe-based low-dimensional heterostructures

Using a tunable laser excitation we have studied with a high resolution the PL and PLE spectra of localized excitons in ZnCdSe/ZnSe MQWs and ZnSe superlattices (SML) with submonolayer insertions of CdSe. Detailed study of fine structure of PLE spectra and the PL spectra at resonant monochromatic exc...

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Bibliographic Details
Published in:Journal of luminescence 2000-05, Vol.87, p.435-437
Main Authors: Permogorov, S, Reznitsky, A, Klochikhin, A, Tenishev, L, von der Osten, W, Vogelsang, H, Stolz, H, Juette, M
Format: Article
Language:English
Subjects:
Excitons
Exciton–phonon interaction
Localization
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Summary:Using a tunable laser excitation we have studied with a high resolution the PL and PLE spectra of localized excitons in ZnCdSe/ZnSe MQWs and ZnSe superlattices (SML) with submonolayer insertions of CdSe. Detailed study of fine structure of PLE spectra and the PL spectra at resonant monochromatic excitation indicates a strong coupling of localized excitons to the phonons all over the Brillouin band, suggesting a tight localization of exciton states. We believe that such a localization is produced by composition fluctuations within QWs or SML, the role of which is strongly enhanced by the low-dimensional character of exciton states.
ISSN:0022-2313
1872-7883
DOI:10.1016/S0022-2313(99)00453-6