QUANTUM BEATS OF EXCITONS IN ZN1-XCDXSE/ZNSE MULTIPLE-QUANTUM-WELL STRUCTURES

被引：5
|
作者：
WECKENDRUP, D
SASCHEK, M
NEUKIRCH, U
GUTOWSKI, J
FERREIRA, SO
SITTER, H
机构：
[1] UNIV LINZ,INST EXPTL PHYS,A-4040 LINZ,AUSTRIA
[2] INST PESQUISAS ESPACIAIS,BERLIN,GERMANY
来源：
JOURNAL OF APPLIED PHYSICS | 1995年 / 77卷 / 08期
关键词：
D O I：
10.1063/1.359505
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the coherent dynamics of excitons in Zn1-xCd xSe/ZnSe multiple quantum wells by means of spectrally integrated and spectrally resolved transient four-wave mixing. When simultaneously exciting the heavy- and light-hole exciton resonance, a beating of the spectrally integrated four-wave mixing signal is observed. The measured beating period does not exactly correspond to the energetic split of the involved free-exciton resonances. By including a bound-exciton state in the calculation of the four-wave mixing signal, quite a reasonable fit can be achieved yielding the dephasing times of the excitonic transitions. The spectrally resolved signal allows to determine the origin of the oscillation as a quantum beat between the light- and heavy-hole exciton. © 1995 American Institute of Physics.
引用
收藏
页码：4145 / 4147
页数：3
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