二维材料堆叠工程的二次谐波产生：表征与调控

doi:10.15541/jim20250507

摘要/Abstract

摘要： 层间堆叠方式在二维材料的晶体对称性与层间库仑相互作用中起着关键作用。通过对堆叠结构的精准调控,可以诱导出丰富的有序态,并赋予材料新颖的光学、电子和磁学性质,从而推动二维材料在非线性光学领域的研究与应用。二维材料具有显著的二阶非线性极化率、原子级厚度以及良好的相位匹配条件,为非线性光学研究提供了理想平台。二次谐波产生(Second harmonic generation, SHG)作为一种重要的非线性光学效应,能够灵敏地反映二维材料的层间堆叠信息,是表征堆叠结构的有力工具。本文对基于SHG技术的二维材料堆叠工程研究进展进行了系统综述。以“堆叠工程”为核心,系统整合了SHG技术在堆叠结构表征与性能调控中的双重应用,重点剖析了同质/异质堆叠、扭转角等关键参数对SHG性能的调控机制。文章详细讨论了利用SHG表征二维材料层数、堆叠顺序和层间转角的多种技术途径,并深入分析了同质堆叠与异质堆叠对SHG响应的调控机制,包括对称性破缺、层间耦合增强等关键物理效应。最后,本文对材料体系拓展与跨维度堆叠结构在微纳器件中的应用前景进行了展望。通过充分发挥堆叠工程的潜力,有望在二维材料中发现更多前所未有的光学与电子特性,为下一代微纳器件的发展提供新的思路与方向,推动基础研究与工业应用的双重进步。

关键词: 二维材料, 堆叠工程, 二次谐波产生, 同质与异质堆叠, 综述

Abstract: The interlayer stacking configurations play a pivotal role in defining the crystal symmetry and Coulomb interactions of two-dimensional (2D) materials, thereby enabling novel ordered states as well as emergent optical, electronic, and magnetic properties through strategic stacking engineering. These 2D material structures, characterized by remarkable second-order susceptibility, atomic-scale thinness, and ideal phase matching, herald new research frameworks in the realm of nonlinear optics. Second harmonic generation (SHG), an essential nonlinear optical phenomenon, offers precise characterization of the interlayer stacking parameters inherent in 2D materials. This paper presents a comprehensive review of SHG technology as applied to the stacking engineering of 2D materials, Centered on “stacking engineering”, this paper systematically integrates the dual applications of SHG technology in the characterization and performance modulation of stacked structures, with a focus on analyzing the regulatory mechanisms of key parameters such as homo/hetero-stacking and twist angles on SHG performance. Through detailed analysis, it highlights the various approaches by which SHG can be used to ascertain the number of layers, stacking order, as well as angular orientations in stacked 2D materials. Furthermore, the paper explores the mechanisms by which both homogeneous and heterogeneous stacking configurations modulate SHG performance, discussing in depth the modulation and enhancement effects induced by stacking engineering. Finally, this review provides a forward-looking perspective on the transformative potential of material diversification as well as cross-dimensional stacking in micro- and nano-device applications. By harnessing the potential of stacking engineering, researchers aim to uncover unprecedented optical and electronic characteristics in 2D materials, ultimately driving the evolution of nano-scale devices and technologies within both scientific research and industrial production domains, fostering significant advancements and novel developments.

Key words: 2D materials, stacking engineering, second harmonic generation, homogeneous and heterogeneous stacking, review

中图分类号:

TQ174

夏芳芳, 黄文娟, 翟天佑. 二维材料堆叠工程的二次谐波产生：表征与调控[J]. 无机材料学报, DOI: 10.15541/jim20250507.

XIA Fangfang, HUANG Wenjuan, ZHAI Tianyou. Second-harmonic Generation in Stacking-engineered 2D Materials: Characterization and Modulation[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250507.

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