Photonics Research, Volume. 7, Issue 7, 711(2019)
Microscopic pump-probe optical technique to characterize the defect of monolayer transition metal dichalcogenides
Fig. 1. (a) Schematic of the experimental measurement by a microscopic pump-probe optical system. M1–M5 are the mirrors, and BS is the beam splitter. The wavelengths of the pump and probe are 400 nm and 680 nm, respectively. The time delay between the two laser pulses is controlled by the stepper motor. (b) Schematic of the dependence of PL mapping, transient differential reflection mapping, and lifetime mapping on the defect number for the same piece of
Fig. 2. (a) High-resolution XPS profiles for Mo 3d of
Fig. 3. Optical properties of the same piece of
Fig. 4. (a)–(c) are the PL mapping images of
Fig. 5. (a)–(c) are the PL mapping images of a
Fig. 6. (a)–(c) are the pump-fluences-dependent differential reflection spectra of the same point of
Fig. 7. (a) is a peak
Fig. 8. (a)–(c) are the decay time of fast decay process
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Ying Yu, Xiankun Zhang, Zhangkai Zhou, Zheng Zhang, Yanjun Bao, Haofei Xu, Limin Lin, Yue Zhang, Xuehua Wang. Microscopic pump-probe optical technique to characterize the defect of monolayer transition metal dichalcogenides[J]. Photonics Research, 2019, 7(7): 711
Category: Optical and Photonic Materials
Received: Apr. 5, 2019
Accepted: Apr. 13, 2019
Published Online: Jun. 4, 2019
The Author Email: Yue Zhang (yuezhang@ustb.edu.cn), Xuehua Wang (wangxueh@mail.sysu.edu.cn)