基于电磁诱导透明的双控多功能超表面  

Dual-Control Multifunctional Metasurfaces Based on Electromagnetic Induced Transparency

作　　者：刘海 赵佳明 陈聪 高鹏 戴耀威 路翔宇 万寅辉 王馨艳 赵思怡 Liu Hai;Zhao Jiaming;Chen Cong;Gao Peng;Dai Yaowei;Lu Xiangyu;Wan Yinhui;Wang Xinyan;Zhao Siyi(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116

出　　处：《中国激光》2024年第6期84-93,共10页Chinese Journal of Lasers

基　　金：国家重点研发计划(2021YFC2902702);国家自然科学基金(51874301)。

摘　　要：提出了一种基于电磁诱导透明(EIT)的多功能偏振无关超表面,其基础结构由1个金属十字结构和4个方环结构组成,并引入了可调控材料硅(Si)以及二氧化钒(VO2),以实现温光双控。利用模拟计算和理论模型分析得到了基础结构作为双明模间接耦合形成EIT透明窗口的结论。由于EIT以及可调控材料的特性,本设计可以在分子传感、可控慢光以及双通道温光双控开关等领域实现应用,并且具有优异的性能。该结构对蔗糖溶液的传感灵敏度为97.6 GHz/(kg/m3),在分子检测领域展示出了巨大潜力。该结构实现了对慢光效应的可选择控制。依据EIT的作用机理,提出了利用可调控材料改变结构谐振进而控制电磁响应的设计思路,并实现了一种双通道温光双控开关,为今后的EIT超表面设计提供了参考。Objective The phenomenon of electromagnetically induced transparency(EIT)was first discovered in atomic systems with threelevel distributions.It is a destructive interference phenomenon between strongly coupled light beams in different transmission paths,which makes initially opaque media transparent.However,the implementation of EIT in atomic systems requires extremely strict external conditions,such as ultralow temperatures and intense pumping light,which limit its practical application and development.In recent years,with vigorous research on metasurfaces,the EIT phenomenon has overcome traditional limitations and can be achieved via the coupling of the bright or dark modes of metasurfaces,thereby expanding its applications in molecular sensing,slow-light devices,and other fields.However,a large portion of the research on EIT metasurfaces selects nonadjustable metal structures in their design,which implies that the designed functionalities are limited to the characteristics of EIT.This considerably restricts the applicable scenarios and hinders further development of this research.This paper introduces adjustable materials into the design of EIT metasurfaces and proposes a multifunctional and polarization-independent metasurface based on EIT.By integrating multiple functions into a single structure,it achieves sensing and measurement of sucrose solvents,controllable slow-light effects,and a temperatureand-light dual-control switch.This significantly enhances the functionality of EIT metasurface devices and demonstrates the design concept of using adjustable materials to change the structural resonance and control the electromagnetic response,thereby providing valuable references for EIT metasurface research.Methods In this study,the EIT phenomenon was mainly achieved by coupling the bright modes.The bright-mode structure can couple with electromagnetic waves in a dipole resonance state with a low-quality factor.The primary metal square ring and cross structures were used as two modes that indirectly couple to

关 键 词：表面光学 超表面 可调控材料 分子传感 慢光效应 温光双控开关 

分 类 号：TN82[电子电信—信息与通信工程]