Publication
Title
Exciton-phonon coupled states in quantum dots
Author
Abstract
This article presents a theoretical analysis of the dependence of the exciton binding energy and exciton-LO-phonon coupling on the cylindrical quantum dot (QD) size. The effect of the temperature on the integrated photoluminescence line intensity is also investigated. Calculations were performed within the effective-mass approximation by using a variational method. Specific applications of these results are given for CdTe QDs embedded in a Cd1-xZnxTe matrix. The excitonic confinement is described by a finite, deep potential well. We observe, on the one-hand, an enhancement of the exciton binding energy and the exciton-LO-phonon coupling energy with decreasing dot size. On the other hand, at high temperature, the LO phonon has a noticeable effect on the photoluminescence intensity. This last physical parameter also shows a great dependence on QD size and on the potential level induced by the barrier material. (C) 2003 American Institute of Physics.
Language
English
Source (journal)
Journal of applied physics / American Institute of Physics. - New York, N.Y., 1937, currens
Publication
New York, N.Y. : American Institute of Physics, 2003
ISSN
0021-8979 [print]
1089-7550 [online]
Volume/pages
93:5(2003), p. 2906-2911
ISI
000181307000094
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 03.01.2013
Last edited 06.10.2017
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