面向片上信息处理的集成拓扑光子器件研究进展(特邀)  

Research Progress in Integrated Topological Photonic Devices for On-Chip Information Processing(Invited)

作　　者：胡攀 孙璐 王洪炜 张永 苏翼凯[1] Hu Pan;Sun Lu;Wang Hongwei;Zhang Yong;Su Yikai(State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《光学学报》2024年第15期421-436,共16页Acta Optica Sinica

基　　金：国家重点研发计划(2023YFB2905503);国家自然科学基金(62035016,62105200,62341508,62335014,62305210)。

摘　　要：集成拓扑光子器件以光为信息载体,为光的传播过程提供拓扑保护,在下一代面向片上信息处理的光子芯片中具有巨大的应用潜力。通过引入拓扑的概念,集成光子系统得以拥有全新的特性,包括单向传播的边界态以及对结构缺陷免疫等。随着对拓扑光子学理论的深入研究,提出和验证了许多基于拓扑光子学原理的器件,展示了拓扑光子学在构建高性能光信息处理芯片方面的广阔前景。本文详细介绍了集成拓扑光子器件的研究进展:首先,从不同的拓扑相或拓扑机制出发,介绍一维、二维拓扑光子集成器件及其在片上光信息处理中的应用;然后,进一步对非厄米、合成维度、非线性以及连续谱束缚态中的拓扑现象及集成光子器件展开讨论;最后,对集成拓扑光子器件面临的问题和发展趋势进行总结和展望。Significance Topology is a branch of mathematics concerned with global properties of geometric structures or parameter spaces that remain unchanged during continuous deformations.Applying topological theory to photonics,known as,topological photonics,has become a significant principle and method in the field,attracting considerable attention for its novel light field manipulation capabilities.As an emerging research field,topological photonics originates from the concept of topological insulators in condensed matter physics.By introducing topology,integrated photonic systems acquire new properties,including unidirectional edge states and robustness against impurities or defects.These properties endow topological photonic devices with great potential for applications in optical communications,quantum computing,and high-precision sensing.Progress This paper reviews the research progress in integrated topological photonic devices for on-chip information processing.Initially,it delves into the basic theory of topological photonics,detailing the design principles of one-and two-dimensional topological photonic devices and their applications in on-chip optical information processing.These applications include waveguides,couplers,splitters,mode-order converters,electro-optical modulators,lasers,optical switches,logic gates,and filters.Each device exhibits unique features and advantages based on different topological phases or mechanisms,such as Zak phase(Fig.1),Floquet phase(Fig.1),topological pumping mechanism(Fig.2),quantum Hall phase(Fig.3),quantum spin Hall phase(Fig.4),and quantum valley Hall phase(Fig.5).In addition,we explore topological photonic devices in emerging fields,including non-Hermitian systems(Fig.6),synthetic dimensions(Fig.7),nonlinear optics(Fig.8),and bound states in the continuum(Fig.9).Examples such as non-Hermitian topological lasers and synthetic dimension microloop modulators illustrate the expansion of topological photonics applications and the realization of new functionalities in practical

关 键 词：集成光学 拓扑光子学 拓扑相 拓扑边界态 集成光子器件 

分 类 号：O436[机械工程—光学工程]