Excitation spectrum, relaxation and coherence of single self-assembled CdSe quantum dots

被引：0
|
作者：
Hundt, A [1 ]
Flissikowski, T [1 ]
Lowisch, M [1 ]
Rabe, M [1 ]
Henneberger, F [1 ]
机构：
[1] Inst Phys, D-10115 Berlin, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2001年 / 224卷 / 01期
关键词：
D O I：
10.1002/1521-3951(200103)224:1<159::AID-PSSB159>3.0.CO;2-G
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on ultra-narrow, long-term stable emission of single, self-assembled CdSe/ZnSe QDs. The excitation spectrum reveals a spectrally sharp excited state with a lifetime of 1.5 ps, related to the LO-phonon decay. In addition, excitation features due to optical and acoustic phonons are present. A strong increase of the exciton-acoustic-phonon coupling is found. The spin relaxation time is much longer than the exciton lifetime of 250 ps. Under resonant excitation, photon brats from a single QD are seen. Coherence of the purely radiatively damped QD exciton is maintained until it recombines.
引用
收藏
页码：159 / 163
页数：5
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