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| 1 | Nonlinear optics of two-dimensional transition metal dichalcogenides显示文摘Nonlinear optics(NLO)of transition metal dichalcogenides(TMDs)is promising for the on-chip photonic and optoelectronic applications.In this review,we will survey the current progress of NLO in TMDs.First,we will brief the basic theory of the NLO in TMDs.Second,several important nonlinear processes in TMDs such as harmonic generation,four-wave mixing,saturable absorption,and two-photon absorption will be presented and their potential applications are also discussed.Third,the main strategies to tune,modulate,and enhance the NLO in TMDs are reviewed,including the excitonic effect,symmetry modulation,optical cavity enhancement,valley selection,edge state,and material phase.Finally,we give an outlook regarding some important issues and directions of NLO in TMDs. | Xinglin Wen Zibo Gong Dehui Li | 2019 | InfoMat2019，1，3： | 11 |
| 2 | Tunable and enhanced light emission in hybrid WS_(2)-optical-fiber-nanowire structures显示文摘In recent years,the two-dimensional(2D)transition metal dichalcogenides(TMDCs)have attracted renewed interest owing to their remarkable physical and chemical properties.Similar to that of graphene,the atomic thickness of TMDCs significantly limits their optoelectronic applications.In this study,we report a hybrid WS_(2)-optical-fibernanowire(WOFN)structure for broadband enhancement of the light-matter interactions,i.e.,light absorption,photoluminescence(PL)and second-harmonic generation(SHG),through evanescent field coupling.The interactions between the anisotropic light field of an optical fiber nanowire(OFN)and the anisotropic second-order susceptibility tensor of WS_(2) are systematically studied theoretically and experimentally.In particular,an efficient SHG in the WOFN appears to be 20 times larger than that in the same OFN before the WS_(2) integration under the same conditions.Moreover,we show that strain can efficiently manipulate the PL and SHG in the WOFN owing to the large configurability of the silica OFN.Our results demonstrate the potential applications of waveguide-coupled TMDCs structures for tunable high-performance photonic devices. | Jin-hui Chen Jun Tan Guang-xing Wu Xue-jin Zhang Fei Xu Yan-qing Lu | 2019 | Light(Science & Applications)2019，8，1： | 9 |
| 3 | 二维过渡金属硫化物二次谐波:材料表征、信号调控及增强显示文摘二维过渡金属硫化物(transition metal dichalcogenides,TMDCs)由于可实现从间接带隙到直接带隙半导体的转变,能带宽度涵盖可见光到红外波段,及二维限域所带来的优异光电特性,在集成光子以及光电器件领域受到了广泛的关注.最近随着二维材料基础非线性光学研究的深入,二维TMDCs也展现出了在非线性光学器件应用上的巨大潜能.本综述聚焦于二维层状TMDCs中关于二次谐波的研究工作.首先简述一些基本的非线性光学定则,然后讨论二维TMDCs中原子层数、偏振、激子共振、能谷等相关的二次谐波特性.之后将回顾这些材料二次谐波信号的调制及增强工作,讨论外加电场、应变、表面等离激元结构、纳米微腔等方法和手段的影响机理.最后进行总结和对未来本领域工作的展望.理解二维TMDCs二次谐波的产生机制及材料自身结构与外场调控机理,将对未来超薄的二维非线性光学器件的发展产生深远的意义. | 曾周晓松 王笑 潘安练 | 2020 | 物理学报2020，69，18： | 4 |
| 4 | 二维材料非线性光学显微显示文摘二维材料的低维度特性带来了诸多新奇的光物理现象,其中微纳尺度上的物性在很大程度上影响甚至主导了二维材料的光学性质。因此,表征微纳尺度的物性及其带来的光学响应,是研究二维材料光物理现象潜在机制的重要手段。相较于光谱技术,光学显微技术可以更精准、更广泛、更详细地描述二维材料的光学响应信息;其中,基于非线性光学信号的显微技术可以有效表征二维材料的基本物性,在宽波段响应下具备高的信噪比和分辨率,为二维材料的基础研究和应用探索提供了重要支撑。本文首先回顾了非线性光学显微在二维材料层数、晶轴、晶界、堆叠和外界耦合等方面取得的研究进展,在此基础上,进一步分析探讨了当前领域的技术难点和发展趋势。 | 江涛 黄迪 宋仁康 刘安航 王占山 程鑫彬 | 2022 | 光学精密工程2022，30，21： | 1 |
| 5 | Two-dimensional materials in photonic integrated circuits:recent developments and future perspectives[Invited]显示文摘The heterogeneous integration of photonic integrated circuits(PICs)with a diverse range of optoelectronic materials has emerged as a transformative approach,propelling photonic chips toward larger scales,superior performance,and advanced integration levels.Notably,two-dimensional(2D)materials,such as graphene,transition metal dichalcogenides(TMDCs),black phosphorus(BP),and hexagonal boron nitride(hBN),exhibit remarkable device performance and integration capabilities,offering promising potential for large-scale implementation in PICs.In this paper,we first present a comprehensive review of recent progress,systematically categorizing the integration of photonic circuits with 2D materials based on their types while also emphasizing their unique advantages.Then,we discuss the integration approaches of 2D materials with PICs.We also summarize the technical challenges in the heterogeneous integration of 2D materials in photonics and envision their immense potential for future applications in PICs. | 谭华 杜磊 杨丰赫 储蔚 詹义强 | 2023 | Chinese Optics Letters2023，21，11： | 1 |
| 6 | 表面等离激元波导中表面等离激元二次谐波的产生机制显示文摘在表面等离激元波导的二次谐波产生过程中,波导较大的色散导致的相位失配阻碍了其实际应用,能够消除相位失配的波导尚未见实验报道。通过将单层二硫化钼与平面表面等离激元波导相结合,在波导中实现从基频表面等离激元到倍频表面等离激元的转化,并研究单层二硫化钼-银结构的二次谐波产生特性,为表面等离激元波导中二次谐波产生的实际应用打下基础。 | 张同舟 徐艺 高宝伟 张家森 | 2022 | 北京大学学报(自然科学版)2022，58，6： | 0 |
| 7 | 过渡金属硫族化合物二阶非线性光学效应的调控及应用显示文摘二阶非线性光学效应源于电子势函数的非谐性,可实现激光的频率转换,被广泛应用于基础科学研究和现代激光技术。单层过渡金属硫族化合物具有极大的二阶非线性系数,作为基础单元实现高效的非线性光学响应潜力巨大。如何保持单层材料的极大非线性系数,扩展材料厚度及响应频段,提升非线性响应,是重要挑战。本文主要介绍了基于单层过渡金属硫族化合物的二阶非线性光学效应的调控,包括单层过渡金属硫族化合物的频率依赖及不同对称性相的多层堆叠等,并总结了过渡金属硫族化合物非线性光学效应的应用前景。 | 吴慧 秦春博 张春峰 | 2023 | 物理学进展2023，43，3： | 0 |
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