Acta Photonica Sinica, Volume. 50, Issue 8, 0850214(2021)
Terahertz Radiation Induced by Transient Photocurrent of MoSe2 Excited by 400 nm Femtosecond Laser (Invited)
The physical effects in layered MoSe2 excited by 400 nm short-wavelength pulse are researched by terahertz emission spectroscopy. The dependence of THz amplitude on pump power, azimuthal angle, and polarization angle shows that the THz radiation is mainly caused by the surface depletion field induced photocurrent and the second-order nonlinear polarization induced shift current. The contribution of transient photocurrent and shift current is 82% and 18%, respectively. The results could provide experimental support for the development and application of MoSe2-based devices in the field of ultra-fast optics.
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Zeyu FAN, Yuanyuan HUANG, Wanyi DU, Zhen LEI, Yixuan ZHOU, Xinlong XU. Terahertz Radiation Induced by Transient Photocurrent of MoSe2 Excited by 400 nm Femtosecond Laser (Invited)[J]. Acta Photonica Sinica, 2021, 50(8): 0850214
Category: Special Issue for Ultrafast Optics
Received: May. 30, 2021
Accepted: Jun. 27, 2021
Published Online: Sep. 1, 2021
The Author Email: ZHOU Yixuan (yxzhou@nwu.edu.cn), XU Xinlong (xlxuphy@nwu.edu.cn)