Rapid Dephasing Related to Intersubband Transitions Induced by Exciton Quantum Beats Observed by a Pump-Probe Technique in a GaAs/AlAs Multiple Quantum Well
Rapid Dephasing Related to Intersubband Transitions Induced by Exciton Quantum Beats Observed by a Pump-Probe Technique in a GaAs/AlAs Multiple Quantum Well
复制标题
GaAs/AlAs 多量子阱中泵浦探针技术观察到的与激子量子拍引起的子带间跃迁相关的快速相移
DOI：
10.1103/physrevb.91.125307
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and K. Akahane
中科院分区：
文献类型：
--
作者：
O. Kojima;K. Kojima;T. Kita;and K. Akahane
我们讨论了通过泵浦探针技术测量的 GaAs/AlAs 多量子阱中与重空穴和轻空穴激子之间的子带间跃迁相关的量子拍振荡的相移。我们研究了移相对温度和泵浦能量的依赖性。对时域信号的分析表明，强量子拍会引起与子带间跃迁相关的快速相移；移相率的依赖性与振幅的依赖性相对应。这意味着量子拍在利用超快光学响应的应用中非常有用。
We discuss the dephasing of quantum beat oscillation related to the intersubband transition between heavy-hole and light-hole excitons in a GaAs/AlAs multiple quantum well as measured by a pump-probe technique. We investigate the dependence of dephasing on temperature and pump energy. The analysis of the time-domain signals reveals that a strong quantum beat induces the rapid dephasing related to intersubband transition; the dependencies of the dephasing rate correspond to those of the amplitude. This implies that a quantum beat is useful in applications utilizing an ultrafast optical response.