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Chirality-Dependent Second Harmonic Generation of MoS2 Nanoscroll with Enhanced Efficiency.
ACS Nano ( IF 15.8 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsnano.0c05189 Qingkai Qian 1 , Rui Zu 2 , Qingqing Ji 3 , Gang Seob Jung 4, 5 , Kunyan Zhang 1 , Ye Zhang 3, 6 , Markus J Buehler 5 , Jing Kong 3 , Venkatraman Gopalan 2, 7, 8 , Shengxi Huang 1
ACS Nano ( IF 15.8 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsnano.0c05189 Qingkai Qian 1 , Rui Zu 2 , Qingqing Ji 3 , Gang Seob Jung 4, 5 , Kunyan Zhang 1 , Ye Zhang 3, 6 , Markus J Buehler 5 , Jing Kong 3 , Venkatraman Gopalan 2, 7, 8 , Shengxi Huang 1
Affiliation
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Materials with high second harmonic generation (SHG) efficiency and reduced dimensions are favorable for integrated photonics and nonlinear optical applications. Here, we fabricate MoS2 nanoscrolls with different chiralities and study their SHG performances. As a 1D material, MoS2 nanoscroll shows reduced symmetry and strong chirality dependency in the polarization-resolved SHG characterizations. This SHG performance can be well explained by the superposition theory of second harmonic field of the nanoscroll walls. MoS2 nanoscrolls with certain chiralities and diameters in our experiment can have SHG intensity up to 95 times stronger than that of monolayer MoS2, and the full potential can still be further exploited. The same chirality-dependent SHG can be expected for nanoscrolls or nanotubes composed of other noncentrosymmetric 2D materials, such as WS2, WSe2, and hBN. The characterization and analysis results presented here can also be exploited as a nondestructive technique to determine the chiralities of these nanoscrolls and nanotubes.
中文翻译：
MoS2纳米卷的手性依赖性第二谐波生成，具有增强的效率。
具有高二次谐波生成（SHG）效率和减小尺寸的材料非常适合集成光子学和非线性光学应用。在这里，我们制作了具有不同手性的MoS 2纳米卷，并研究了它们的SHG性能。作为一维材料，MoS 2纳米卷在偏振分辨的SHG表征中显示出降低的对称性和强烈的手性依赖性。SHG的这种性能可以用纳米滚动壁的二次谐波场的叠加理论很好地解释。在我们的实验中，具有一定手性和直径的MoS 2纳米卷可以比单层MoS 2的SHG强度高95倍，而全部潜力仍可进一步开发。对于由其他非中心对称2D材料（例如WS 2，WSe 2和hBN）组成的纳米卷或纳米管，可以预期到相同的手性依赖性SHG 。这里介绍的表征和分析结果也可以用作确定这些纳米卷和纳米管的手性的一种非破坏性技术。
更新日期：2020-10-28
中文翻译：
MoS2纳米卷的手性依赖性第二谐波生成，具有增强的效率。
具有高二次谐波生成（SHG）效率和减小尺寸的材料非常适合集成光子学和非线性光学应用。在这里，我们制作了具有不同手性的MoS 2纳米卷，并研究了它们的SHG性能。作为一维材料，MoS 2纳米卷在偏振分辨的SHG表征中显示出降低的对称性和强烈的手性依赖性。SHG的这种性能可以用纳米滚动壁的二次谐波场的叠加理论很好地解释。在我们的实验中，具有一定手性和直径的MoS 2纳米卷可以比单层MoS 2的SHG强度高95倍，而全部潜力仍可进一步开发。对于由其他非中心对称2D材料（例如WS 2，WSe 2和hBN）组成的纳米卷或纳米管，可以预期到相同的手性依赖性SHG 。这里介绍的表征和分析结果也可以用作确定这些纳米卷和纳米管的手性的一种非破坏性技术。
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