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
190.4400 Nonlinear optics, materials 160.4236 Nanomaterials 190.5970 Semiconductor nonlinear optics including MQW 020.4180 Multiphoton processes
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.