Time-resolved optical spectroscopy in Cd1-xMnxTe/ZnTe multiple quantum wells

Citation
R. Pittini et al., Time-resolved optical spectroscopy in Cd1-xMnxTe/ZnTe multiple quantum wells, J LUMINESC, 87-9, 2000, pp. 393-395
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LUMINESCENCE
ISSN journal
0022-2313 → ACNP
Volume
87-9
Year of publication
2000
Pages
393 - 395
Database
ISI
SICI code
0022-2313(200005)87-9:<393:TOSICM>2.0.ZU;2-9
Abstract
Time-resolved photoluminescence (PL) and optical pump-probe experiments wer e carried out in Cd1-xMnxTe/ZnTe multiple quantum wells to study the dynami cs of the excitonic magnetic polaron in this material. In the pump-probe da ta, three signals were detected. The main signal is negative and monitors t he energy relaxation of the excitons created by the pump pulse. The other t wo pump-probe signals are positive and their intensity grows while the exci tons created by the pump pulse recombine. The low-energy positive pump-prob e signal is found to track the average Mn spin polarization in the sample. Instead, the high-energy positive peak indicates the enhancement of the den sity of states due to correlation effects. (C) 2000 Published by Elsevier S cience B.V. All rights reserved.