Exciton dynamics in quantum nanostructures of II-VI diluted magnetic semiconductors

Citation
Y. Oka et al., Exciton dynamics in quantum nanostructures of II-VI diluted magnetic semiconductors, PHYS ST S-B, 221(1), 2000, pp. 495-498
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
0370-1972 → ACNP
Volume
221
Issue
1
Year of publication
2000
Pages
495 - 498
Database
ISI
SICI code
0370-1972(200009)221:1<495:EDIQNO>2.0.ZU;2-U
Abstract
Time and spectrally reserved photoluminescence has been studied in quantum dots and quantum wires of Cd1-xMnxSe. The quantum dots of Cd0.97Mn0.03Se (d ot size 4 to 6 nm) show exciton luminescence at around 2.4 eV, which is cau sed by a strong confinement effect for the exciton energy. The observed gia nt Zeeman shift of the exciton luminescence (with an effective g-factor of 91) indicates the exchange interaction of the excitons with the Mn ions in the dots. The quantum wires of Cd0.92Mn0.08Se (wire width 26 to 126 nm) sho w exciton luminescence which shifts by 5.2 meV to the higher-energy side wi th decreasing wire width due to the influence of the one-dimensional quantu m confinement effect. The effective g-factor of the exciton in these quantu m wires is 100 to 150. The magnetic polaron formation of excitons in the qu antum wires is discussed.