Ultrafast spectral hole burning spectroscopy of exciton spin flip processes in InAs/GaAs quantum dots

被引：11
|
作者：
Mueller, T. [1 ]
Strasser, G.
Unterrainer, K.
机构：
[1] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria
[2] Vienna Univ Technol, Zentrum Mikro & Nanostrukturen, A-1040 Vienna, Austria
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 19期
基金：
奥地利科学基金会;
关键词：
D O I：
10.1063/1.2202721
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The exciton spin relaxation within the radiative doublet of the exciton ground state in InAs/GaAs self-assembled quantum dots is studied via an ultrafast spectral hole burning technique. In the case of cross-polarized pump and probe pulses a spectral "antihole" emerges due to relaxation of the exciton spin. The measured relaxation time decreases rapidly from 1.15 ns at T=5 K to 90 ps at 90 K, suggesting exciton-acoustic phonon interaction as the underlying spin relaxation mechanism. (c) 2006 American Institute of Physics.
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页数：3
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