拓扑绝缘体高次谐波产生的研究进展  

Research progress of high-order harmonics in topological insulators

作　　者：张嘉宁 刘秀兰 杨乐怡 彭良友[1,2] ZHANG JiaNing;LIU XiuLan;YANG LeYi;PENG LiangYou(State Key Laboratory of Artificial Microstructure and Mesoscoic Physics,School of Physics,Peking University,Beijing 100871,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China)

机构地区：[1]人工微结构和介观物理国家重点实验室,北京大学物理学院,北京100871 [2]北京量子信息科学研究院,北京100193

出　　处：《中国科学:物理学、力学、天文学》2025年第1期49-66,共18页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:92250303,12234002)资助项目。

摘　　要：近年来,随着红外激光技术的进步,高次谐波的研究范围扩展到了固体材料.许多实验和理论工作发现,拓扑绝缘体的高次谐波表现出独特的性质,例如增强的谐波产率、特殊的椭偏依赖性以及圆二色性等.本文回顾了近年来人们在拓扑绝缘体高次谐波方面的研究进展,分别介绍了SSH模型(一维体系)、Haldane模型(二维体系)和Z2拓扑绝缘体(三维体系)的高次谐波特性,这些特性源于拓扑相材料的贝里曲率和边界态(表面态)等性质.最后,我们讨论了高次谐波作为探测物质拓扑性的可靠标志的可能性,并展望了未来的研究方向.对拓扑材料高次谐波的研究不仅有助于深入理解固体材料中高次谐波的产生机制,还具备揭示拓扑物性的潜在意义.In recent years,with the advancement of the infrared laser technology,the study of high-order harmonic generation has expanded to solid materials.Numerous experimental and theoretical studies have revealed that the high-order harmonics in topological insulators exhibit unique properties,such as enhanced harmonic yields,the specific ellipticity dependence,and the circular dichroism.This work reviews the recent progress in the study of high-order harmonics in topological insulators,focusing on the harmonic characteristics of the SSH model(one-dimensional system),the Haldane model(two-dimensional system),and the Z2 topological insulator(three-dimensional system).These characteristics are related to the Berry curvature and boundary states(surface states)of topological phase materials.Finally,the potential of high-order harmonics as a reliable indicator for probing the topology of materials is discussed,along with future research directions.The study of high-order harmonics in topological materials not only deepens the understanding of the mechanisms of high-order harmonics in solid materials,but also has the potential to reveal the profound significance of topological properties.

关 键 词：拓扑绝缘体 边缘态 贝里曲率 高次谐波辐射 圆二色性 椭偏依赖性 

分 类 号：O469[理学—凝聚态物理]