Abstract NiS2/MoS2 composites were synthesized by a hydrothermal method. The scanning electron microscope, energy dispersive spectrometer analyses, and transmission electron microscopy confirmed that the NiS2 particles were distributed on the basal surface of MoS2 nanosheets. Then, the NiS2/MoS2 composites were dispersed in methyl methacrylate (MMA) which was polymerized to poly(methyl methacrylate) (PMMA) to prepare NiS2/MoS2/PMMA organic glass. The nonlinear optical (NLO) and optical limiting (OL) properties of the NiS2/MoS2/PMMA organic glass were studied via an open-aperture (OA) Z-scan technique. As the input energy varies from 20 to 70 μJ, the NiS2/MoS2/PMMA organic glass changes from saturable absorption (SA) to reverse saturable absorption (RSA). Compared to the NiS2/PMMA and MoS2/PMMA organic glasses, the NiS2/MoS2/PMMA organic glass is observed with enhanced NLO and OL properties, which were attributed to the interfacial charge transfer between NiS2 particles and MoS2 nanosheets, the unique band gap structure of NiS2 particles, and the layered structure of MoS2 nanosheets. The nonlinear absorption coefficient of the NiS2/MoS2/PMMA organic glass could be up to 5.03 × 10−9 mW−1. Thus the NiS2/MoS2/PMMA organic glass have a broad vision of application in ultrafast optical switches, optical shutters and optical limiters.

中文翻译：

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NiS2/MoS2复合材料的合成及非线性光学性能

摘要 采用水热法合成了NiS2/MoS2复合材料。扫描电子显微镜、能谱分析和透射电子显微镜证实 NiS2 颗粒分布在 MoS2 纳米片的基底表面。然后，将 NiS2/MoS2 复合材料分散在甲基丙烯酸甲酯 (MMA) 中，甲基丙烯酸甲酯 (MMA) 聚合成聚甲基丙烯酸甲酯 (PMMA)，制备 NiS2/MoS2/PMMA 有机玻璃。通过开放孔径 (OA) Z 扫描技术研究了 NiS2/MoS2/PMMA 有机玻璃的非线性光学 (NLO) 和光学限制 (OL) 特性。当输入能量从 20 到 70 μJ 变化时，NiS2/MoS2/PMMA 有机玻璃从饱和吸收 (SA) 变为反饱和吸收 (RSA)。与 NiS2/PMMA 和 MoS2/PMMA 有机玻璃相比，观察到 NiS2/MoS2/PMMA 有机玻璃具有增强的 NLO 和 OL 特性，这归因于 NiS2 颗粒和 MoS2 纳米片之间的界面电荷转移、NiS2 颗粒独特的带隙结构以及 MoS2 纳米片的层状结构。NiS2/MoS2/PMMA 有机玻璃的非线性吸收系数可达 5.03 × 10−9 mW−1。因此，NiS2/MoS2/PMMA 有机玻璃在超快光开关、光闸和光限幅器方面具有广阔的应用前景。03 × 10−9 mW−1。因此，NiS2/MoS2/PMMA 有机玻璃在超快光开关、光闸和光限幅器方面具有广阔的应用前景。03 × 10−9 mW−1。因此，NiS2/MoS2/PMMA 有机玻璃在超快光开关、光闸和光限幅器方面具有广阔的应用前景。