连续域束缚态赋能的太赫兹超表面:从机理到应用  

Terahertz Metasurfaces Empowered by Bound States in the Continuum:from Mechanism to Applications

作　　者：孙广成 王玥 李曜合 闫志巾 胡辉[1,2] SUN Guangcheng;WANG Yue;LI Yaohe;YAN Zhijin;HU Hui(Key Laboratory of Ultrafast Photoelectric and Terahertz Science in Shaanxi,Xi'an 710054,CHN;School of Science,Xi'an University of Technology,Xi'an 710054,CHN)

机构地区：[1]陕西省超快光电技术与太赫兹科学重点实验室,西安710048 [2]西安理工大学理学院,西安710048

出　　处：《固体电子学研究与进展》2024年第5期430-444,共15页Research & Progress of SSE

基　　金：国家自然科学基金资助项目(62275215,62435015);陕西省重点研发计划项目(2023GXLH-038);西安市科技局重点产业链关键核心技术攻关项目(23LLRH0057);陕西省高校青年创新团队建设项目(21JP084)。

摘　　要：太赫兹(Terahertz,THz)超表面能够在亚波长尺度下对入射光子进行捕获,并在共振频率处产生强烈的局域场增强效应,表现出卓越的光场操控能力。光子连续域束缚态(Bound states in the continuum,BIC)是位于辐射连续域内的非辐射本征态,具有无限高Q因子和动量空间偏振涡旋两个卓越特性,为在THz超表面中定制高Q共振和增强光场操控带来了新的机遇。本文从回顾光学BIC的历史发展进程出发,综述了周期性光学系统中各类BIC的物理性质及其产生机理,并从拓扑角度着重讨论了BIC的产生及演化规律。此外,着重介绍了BIC赋能的超表面在THz光子学领域的新兴应用,讨论了该领域面临的挑战并对其发展前景作了展望。Terahertz(THz)metasurfaces exhibit remarkable light-field manipulation capabilities due to their ability to capture incident photons at sub-wavelength scales and generate strong confined field-enhancing effects at resonance frequencies.Photonic bound states in the continuum(BIC)are non-radiative eigenstates located in the radiative continuum,with two outstanding properties of infinitely high Q factor and momentum spatial polarization vortex,which bring new opportunities for customization of high-Q resonance and enhanced light field manipulation in terahertz metasurface.This paper reviews the historical development of optical BIC,summarizes the physical properties and formation mechanism of different types of BIC in periodic optical systems,and discusses the generation and evolution of BIC from topological perspectives.In addition,the review focuses on the emerging applications of BIC-driven metasurfaces in THz photonics,and concludes with a discussion of the challenges and prospects in this field.

关 键 词：连续域束缚态 太赫兹超表面 Q因子 拓扑特性 光电子器件 

分 类 号：O436[机械工程—光学工程]