Dual-comb-based asynchronous pump-probe measurement with an ultrawide temporal dynamic range for characterization of photo-excited InAs quantum dots
Dual-comb-based asynchronous pump-probe measurement with an ultrawide temporal dynamic range for characterization of photo-excited InAs quantum dots
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DOI：
10.35848/1882-0786/ab8b4f
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发表时间：
2020-06-01
影响因子：
2.3
通讯作者：
Minoshima, Kaoru
中科院分区：
文献类型：
--
作者：
Asahara, Akifumi;Arai, Yuto;Minoshima, Kaoru
本文介绍了一种基于双梳状结构的异步光取样（ASOPS）泵浦探测测量系统，用于测量光激发自组装InAs量子点（QD）半导体的弛豫动力学特性。虽然光激发量子点材料具有多个复杂的弛豫过程，但通过使用ASOPS系统，在亚秒的短采集时间内成功地获得了瞬态透射响应（从飞秒到纳秒）。这是以高稳定性和大约10（5）的极宽时间动态范围实现的。所开发的系统的效用被证明是一个强大的和易于使用的测量工具，用于研究复杂的光激发动力学的量子点材料。
A dual-comb-based asynchronous optical sampling (ASOPS) pump-probe measurement system is demonstrated for characterizing the relaxation dynamics in a photo-excited self-assembled InAs quantum dot (QD) semiconductor. Although the photo-excited QD material has multiple complex relaxation processes, the transient transmittance responses (from femtoseconds to nanoseconds) are successfully obtained within a sub-second short acquisition time by using the ASOPS system. This is achieved with high stability and an extremely wide temporal dynamic range of approximately 10(5). The utility of the developed system is demonstrated as a powerful and easy-to-use measurement tool for studying the complex photo-excited dynamics of QD materials.