Contribution of drift photocurrent in bulk and monolayer SnS2 probed by terahertz emission spectroscopy

Zhen Lei; Wanyi Du; Yuanyuan Huang; Jiawei Chang; He Wang; Xinlong Xu

doi:10.1117/12.2604360

9 September 2021 Contribution of drift photocurrent in bulk and monolayer SnS₂ probed by terahertz emission spectroscopy

Zhen Lei, Wanyi Du, Yuanyuan Huang, Jiawei Chang, He Wang, Xinlong Xu

Author Affiliations +

Proceedings Volume 11909, Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021); 119090E (2021) https://doi.org/10.1117/12.2604360
Event: Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021), 2021, Chengdu, China

Abstract

We report the optical response of layered bulk and monolayer SnS₂ at the surface. The physical mechanism for terahertz (THz) emission in bulk and monolayer SnS₂ has been proposed. At 40° incident angle, the drift current accompanied by the surface nonlinear polarization concurrently contribute to THz surface emission in bulk SnS_2. The THz radiation in monolayer SnS₂is mainly attributed to the drift photocurrent, which is insensitive to the crystalline symmetry and the pump polarization direction. The corresponding investigation could not only help to clarify the relationship of layer-dependent optical properties, but also make a significant contribution in understanding the nonlinear physical process in other transition metal dichalcogenides (TMDs) materials.

Citation Download Citation

Zhen Lei, Wanyi Du, Yuanyuan Huang, Jiawei Chang, He Wang, and Xinlong Xu "Contribution of drift photocurrent in bulk and monolayer SnS₂ probed by terahertz emission spectroscopy", Proc. SPIE 11909, Tenth International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2021), 119090E (9 September 2021); https://doi.org/10.1117/12.2604360

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