基于劈裂环的光学天线研究  

Research on Optical Antenna Based on Split Ring Resonator

作　　者：张锦华 张益华 田汶翔 Jinhua Zhang;Yihua Zhang;Wenxiang Tian(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai;School of Information and Control Engineering,Xi’an University of Architecture and Technology College,Xi’an Shaanxi)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海 [2]西安建筑科技大学信息与控制工程学院,陕西西安

出　　处：《建模与仿真》2024年第4期4558-4565,共8页Modeling and Simulation

摘　　要：光学天线是一个新兴领域,可以与自由空间电磁波发生相互作用,把光场限制在亚波长的尺寸,促使天线狭缝处电场的局域增强。光学天线的提出使得在亚波长尺寸下调控光场成为可能,在光学成像、光学传感、纳米光学等领域具有广泛的应用。本文将对劈裂环天线进行深入研究,在电场作用下劈裂环将产生两种共振模式,分别是低频的电感–电容(LC)共振和高频的偶极共振,在天线表面形成环形振荡电流和线性振荡电流。两种共振模式可以很好地实现电场局域增强。Optical antennas are a new field,which can interact with free-space electromagnetic waves,limit the light field to the subwavelength size,and promote the local enhancement of the electric field at the antenna slit.The proposed optical antenna makes it possible to regulate the light field at sub-wavelength size,and has wide applications in optical imaging,optical sensing,nano-optics and other fields.In this paper,the split-ring antenna will be deeply studied.Under the action of electric field,the split-ring will produce two resonance modes,namely,low-frequency inductance capacitance(LC)resonance and high-frequency dipole resonance,which will form a ring oscilla-tion current and a linear oscillation current on the antenna surface.The two resonance modes can realize the local enhancement of electric field well.

关 键 词：光学天线 劈裂环 LC共振 偶极共振 电场局域增强 

分 类 号：TN8[电子电信—信息与通信工程]