基于近场电磁扫描系统的电磁超透镜实验表征  

ELECTROMAGNETIC METALENSES BASED ON NEAR-FIELD ELECTROMAGNETIC WAVES SCANNING SYSTEMS

作　　者：陈晓东 雷霆锋[1] 陈鸿翔 庞晓宁 董建文 赵福利 CHEN Xiaodong;LEI Tingfeng;CHEN Hongxiang;PANG Xiaoning;DONG Jianwen;ZHAO Fuli(School of Physics,Sun Yat-sen University,Guangzhou,Guangdong 510275;National Demonstration Center for Experimental Physics Education,Guangzhou,Guangdong 510275)

机构地区：[1]中山大学物理学院 [2]物理学国家级实验教学示范中心(中山大学),广东广州510275

出　　处：《物理与工程》2024年第5期144-149,共6页Physics and Engineering

基　　金：粤疆藏区域联合光学虚拟教研共同体建设(GDSGGT2022003);2022年度广东省高校教学质量与教学改革工程项目光学虚拟教研室(粤教高函[2023]4号)。

摘　　要：透镜是光学实验中常见的元件,也是成像系统中必不可少的一环。然而随着集成成像等新型光学成像技术的发展,传统光学透镜因其体积大等劣势难以实现微型化和集成化。近年来,超透镜作为平面光学元件,通过设计亚波长尺寸的单元结构可以实现对光的偏振、振幅、相位等方面的调控,这些独特的光学特性也使超透镜成为了近些年来微纳光学领域的研究热门。为了激发学生对前沿课题的研究兴趣,本文将介绍超透镜的工作原理,并设计了一种会聚型电磁超透镜,通过数值仿真与实验表征验证了超透镜的聚焦性能与反常色散特性,帮助学生更好地理解超透镜,推动教学与科研的结合。Lenses are common components in optical experiments and are essential in imaging systems.However,with the development of new optical imaging technologies such as integrated imaging,traditional optical lenses face challenges in miniaturization and integration due to their large size.In recent years,meta-lenses,as planar optical elements,can manipulate light in terms of polarization,amplitude,phase,and other aspects by designing sub-wavelength units.These unique optical properties have also made meta-lenses a hot topic in the field of micro-nano optics in recent years.To inspire students'interest in researching cuttingedge topics,this paper introduces the working principle of meta-lenses and designs a converging electromagnetic meta-lens.Through numerical simulation and experimental characterization,the focusing performance and anomalous dispersion characteristics of the meta-lens are validated,helping students to better understand meta-lenses and promoting the integration of teaching and research.

关 键 词：超构光学 超透镜 近场电磁扫描系统 

分 类 号：TH74[机械工程—光学工程]