Optical- and acoustical-phonon-assisted hopping of localized excitons in CdTe/ZnTe quantum wells

H. Kalt, J. Collet, S. D. Baranovskii, Rosari Saleh, P. Thomas, Le Si Dang, J. Cibert

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Interaction with both acoustical as well as optical phonons contributes to the relaxation of excitons in tail states of coherently strained CdTe/ZnTe quantum wells. The contribution of acoustical phonons is most important in the thinnest well of 1.8 monolayers. Hopping down, which involves the emission of acoustic phonons, leads to a redshift of the luminescence band of about 10 meV within the first 200 ps after excitation. A comparison of the experimental data with results of a quantitative theory allows us to evaluate the concentration of localized states involved in the relaxation process.

Original languageEnglish
Pages (from-to)4253-4257
Number of pages5
JournalPhysical Review B
Volume45
Issue number8
DOIs
Publication statusPublished - 1 Jan 1992

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