Chinese Optics Letters, 2019, 17 (8): 081901, Published Online: Jul. 17, 2019  

Two-photon absorption towards pulse modulation in mechanically exfoliated and CVD monolayer cascaded MoS2 structures Download: 772次

Author Affiliations
1 Laboratory of Micro-Nano Photonic and Optoelectronic Materials and Devices, Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures of Ministry of Education, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China
4 Department of Physics, Engineering Physics & Astronomy and Department of Chemistry, Queen’s University, Kingston K7L-3N6, Ontario, Canada
5 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract
Mechanical exfoliation (ME) and chemical vapor deposition (CVD) MoS2 monolayers have been extensively studied, but the large differences of nonlinear optical performance between them have never been clarified. Here, we prepared MoS2 monolayers using ME and CVD methods and investigated the two-photon absorption (TPA) response and its saturation. We found that the TPA coefficient of the ME monolayer was about (1.88 ± 0.21) × 103 cm/GW, nearly two times that of the CVD one at (1.04 ± 0.15) × 103 cm/GW. Furthermore, we simulated and compared the TPA-induced optical pulse modulation in multilayer cascaded structures, which is instructive and meaningful for the design of optical devices such as a beam shaper and optical limiter.

Yafeng Xie, Saifeng Zhang, Xiaoyan Zhang, Ningning Dong, Ivan M. Kislyakov, Song Luo, Zhanghai Chen, Jean-Michel Nunzi, Long Zhang, Jun Wang. Two-photon absorption towards pulse modulation in mechanically exfoliated and CVD monolayer cascaded MoS2 structures[J]. Chinese Optics Letters, 2019, 17(8): 081901.

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