Dual-comb-based asynchronous pump-probe measurement with an ultrawide temporal dynamic range for characterization of photo-excited InAs quantum dots

被引：17
作者：
Asahara, Akifumi [1 ,2 ]
Arai, Yuto [3 ]
Saito, Tomohiro [3 ]
Ishi-Hayase, Junko [3 ]
Akahane, Kouichi [4 ]
Minoshima, Kaoru [1 ,2 ]
机构：
[1] Univ Electrocommun UEC, Grad Sch Informat & Engn, Dept Engn Sci, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
[2] JST, ERATO MINOSHIMA Intelligent Opt Synthesizer IOS P, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
[3] Keio Univ, Sch Fundamental Sci & Technol, Kohoku Ku, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan
[4] Natl Inst Informat & Commun Technol NICT, 4-2-1 Nukui Kitamachi, Koganei, Tokyo 1848795, Japan
来源：
APPLIED PHYSICS EXPRESS | 2020年 / 13卷 / 06期
关键词：
Asynchronous optical sampling; Optical frequency comb; Pump-probe spectroscopy; Quantum dots; RESOLVED OPTICAL CHARACTERIZATION; MU-M; SPECTROSCOPY; LASERS; LIGHT;
D O I：
10.35848/1882-0786/ab8b4f
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：4
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