Revealing the intrinsic nonlinear optical response of a single MoS2 nanosheet in a suspension based on spatial self-phase modulation
Revealing the intrinsic nonlinear optical response of a single MoS2 nanosheet in a suspension based on spatial self-phase modulation
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基于空间自相位调制揭示悬浮液中单个 MoS2 纳米片的固有非线性光学响应
DOI：
10.1364/prj.399364
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发表时间：
2020-11
影响因子：
7.6
通讯作者：
Wang Yingwei
中科院分区：
文献类型：
--
作者：
Xiao Si;Ma Ying;He Yilin;Wang Yiduo;Xin Hao;Fan Qi;Zhang Jingdi;Li Xiaohong;Zhang Yu;He Jun;Wang Yingwei
非局域电子相干引起的二维材料重定向是激光照射下二维材料空间自相位调制的形成机制，被广泛称为“风铃”模型。在这里，我们提出了一种方法，为二维材料诱导的空间自相位调制的重新定向提供了强有力的证据。对传统的“风铃”模型进行了修正，考虑了入射光束在光程方向上的衰减，即阻尼。因此，我们可以提取单个MoS2纳米片的非线性折射率，而不是简单地从由所有纳米片组成的等效MoS2薄膜中获取折射率。我们的方法引入了一种通用的、精确的方法来提取二维材料系统的内在非线性光学参数。(C) 2020中国激光出版社
The reorientation of 2D materials caused by nonlocal electron coherence is the formation mechanism of 2D material spatial self-phase modulation under laser irradiation, which is widely known as the "wind-chime" model. Here, we present a method that provides strong evidence for the reorientation of 2D-material-induced spatial self-phase modulation. The traditional "wind-chime" model was modified by taking into account the attenuation, i.e., damping of the incident light beam in the direction of the optical path. Accordingly, we can extract the nonlinear refractive index of a single MoS2 nanosheet, instead of simply obtaining the index from an equivalent MoS2 film that was constructed by all nanosheets. Our approach introduces a universal and accurate method to extract intrinsic nonlinear optical parameters from 2D material systems. (C) 2020 Chinese Laser Press
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