二维材料中的二次谐波及其调控方法  

Second harmonic generation in two-dimensional materials and its modulation methods

作　　者：黄慕杨 乔辉 姚博文 黄宗玉 罗斯玮 祁祥 HUANG MuYang;QIAO Hui;YAO BoWen;HUANG ZongYu;LUO SiWei;QI Xiang(Hunan Provincial Key Laboratory of Micro-nano Energy Materials and Devices,School of Physics and Optoelectronics,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学物理与光电工程学院,微纳能源材料与器件湖南省重点实验室,湘潭411105

出　　处：《中国科学：物理学、力学、天文学》2023年第8期2-23,共22页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点研发计划(编号:2022YFA1602602);国家自然科学基金(编号:12274359);湖南省杰出青年基金(编号:2023JJ10037);湖南省教育厅科学研究基金(编号:21B0128);湖南省自然科学基金(编号:2022JJ30553,2021JJ40524);长江学者和创新团队发展计划(编号:IRT-17R91)资助项目。

摘　　要：二维材料(Two-Dimensional Materials)由于其低维尺度下的量子效应,表现出许多奇特的物理现象,引起了广大学者的研究兴趣.在非线性光学领域,二维材料展现出较高的二阶非线性极化率和高度可调的物理特性,使其成为非线性光电器件的潜在候选者之一.本文主要探讨了二维材料中二次谐波产生(Second Harmonic Generation,SHG)的调控与增强手段;简要介绍了二次谐波产生的基本光学原理,从二阶非线性系数和光与物质相互作用两个主要角度出发,分别回顾了对称性破缺和共振效应调控与增强二维材料二次谐波的不同方法,如层间堆叠、电场、应变和激子效应等;总结了二维材料二次谐波的调控方法,并对未来可能的研究方向和面临的挑战进行展望.了解二次谐波的产生机制以及调控和增强二次谐波各种策略方法,更有利于未来开发基于二次谐波的表征技术和探索基于二维材料的非线性光学器件.Two-dimensional(2D)materials exhibit numerous unique physical phenomena due to the quantum effect on the lowdimensional scale,which has aroused the research interest of many researchers.In nonlinear optics,2D materials exhibit high second-order nonlinear polarizability and highly adjustable physical properties,making them a potential candidate for nonlinear optoelectronic devices.This study focuses on the modulation and enhancement of second harmonic generation(SHG)in 2D materials.In this study,we first briefly introduce the basic optical concept of SHG,and then discuss the different methods of symmetry breaking and resonance effect to modulate and enhance the SHG of twodimensional materials,such as interlayer stacking,electric field,strain and exciton effect.Finally,we summarize the control methods of SHG,and look forward to the possible research directions and challenges in the future.Understanding the mechanism of SHG and various techniques of modifying and boosting SHG will be more conducive to the development of second harmonic characterization technology and the exploration of nonlinear optical devices based on2D materials in the future.

关 键 词：非线性光学 二次谐波 二维材料 对称性破缺 共振效应 

分 类 号：O437[机械工程—光学工程]