Exchange interaction and phonon confinement in CdSe quantum dots

被引：91
|
作者：
Woggon, U
Gindele, F
Wind, O
Klingshim, C
机构：
[1] Institut für Angewandte Physik der Universität Karlsruhe, 76131 Karlsruhe
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.54.1506
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fine structure of the lowest (1S(3/2), 1s(e)) electron-hole pair state has been studied for CdSe quantum dots embedded in glass and with sizes R<a(B). Besides the very narrow peaks from the exchange-split lowest pair states (full width at half maximum of 2 meV), two additional structures have been found in luminescence and assigned to confined acoustic photons. The observation of discrete acoustic phonons in the emission spectra verifies the importance of low-frequency acoustic phonons for energy relaxation in quantum dots. The size dependence of the different peaks has been determined and compared with theoretical models.
引用
收藏
页码：1506 / 1509
页数：4
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