Dephasing of excitons in ZnSe and ZnSe/ZnSxSe1-x quantum wells

被引：2
|
作者：
Wagner, HP
Lehmann, J
Hahn, B
机构：
[1] Universitaet Regensburg, Regensburg
来源：
JOURNAL OF LUMINESCENCE | 1995年 / 66-7卷 / 1-6期
关键词：
D O I：
10.1016/0022-2313(95)00112-3
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the optical dephasing of photoexcited excitons in two different ZnSe/ZnSxSe1-x layer structures by means of time-integrated four-wave mixing using subpicosecond pulses. We find dephasing times of the order of 0.5 ps for the exciton ground state at 9 K. The dephasing time shows a dependence on the excitation intensity due to exciton-exciton scattering. Simultaneous excitation of the exciton ground slate and higher exciton states leads to the appearance of the quantum beats.
引用
收藏
页码：84 / 88
页数：5
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