EXCHANGE INTERACTION IN II-VI QUANTUM DOTS AND WELLS

Authors
WOGGON U GINDELE F LANGBEIN W HETTERICH M
Citation
U. Woggon et al., EXCHANGE INTERACTION IN II-VI QUANTUM DOTS AND WELLS, Physica status solidi. a, Applied research, 164(1), 1997, pp. 505-510
Citations number
13
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
164
Issue
1
Year of publication
1997
Pages
505 - 510
Database
ISI
SICI code
0031-8965(1997)164:1<505:EIIIQD>2.0.ZU;2-C
Abstract
By photoluminescence and excitation spectroscopy the size dependence o f the exchange-splitting energy has been determined for CdSe quantum d ots with sizes below the bulk excitonic Bohr radius and different inte rdot distances. An enhancement over the bulk value of more than one or der of magnitude is observed. In ultrathin CdS/ZnS single quantum well s the exchange splitting is found and explained within the model of a quantum disc. The relaxation process and the temporal development of t he polarization degree are studied.