基于等离子体超材料的超宽带吸波体设计  

Ultra-Broadband Absorber Based on Plasma Metamaterials

作　　者：杨靖[1] 章海锋 张浩[1] 刘佳轩 Yang Jing;Zhang Haifeng;Zhang Hao;Liu Jiaxuan(College of Electronic and Optical Engineering ＆ College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China;National Experimental Teaching Demonstration Center of Electronic Science and Technology Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China;National Virtual Simulation Experimental Teaching Center of Information and Electronic Technology Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院微电子学院,江苏南京210023 [2]南京邮电大学电子科学与技术国家级实验教学示范中心,江苏南京210023 [3]南京邮电大学信息电子技术国家级虚拟仿真实验教学中心,江苏南京210023

出　　处：《激光与光电子学进展》2018年第9期340-348,共9页Laser & Optoelectronics Progress

基　　金：中国博士后特优资助项目(2016T90455);中国博士后面上项目(2015M581790);江苏省博士后面上项目(1501016A);南京邮电大学引进人才科研启动基金(高水平师资)(NY217131)

摘　　要：为了在横电(TE)波下获得可调谐的超宽带吸收频谱以及在横磁(TM)波下获得较高的反射率,利用等离子体超材料和集总电阻设计了一种电磁吸波体,并采用全波仿真法对其吸收率、反射率、表面电场图、表面电流图和能量损耗图进行了计算,讨论了其结构参数及电阻对吸收率和反射率的影响。研究结果表明,通过激励不同的等离子体谐振区域,不但能改善吸收特性,还能获得可调谐的吸收频谱;设计的电磁吸波体不仅能实现对TE波的超宽带吸收,还能实现TE波和TM波的极化分离。In order to obtain a tunable ultra-broadband absorption spectrum under transverse electric （TE） waves and a high reflectivity under transverse magnetic （TM） waves, an electromagnetic absorber is designed based on the plasma metamaterials and the lumped resistors. Its absorptivity, reflectivity, surface electric field diagram, surface current diagram and energy loss diagram are calculated by the full wave simulation method. The influences of its structural parameters and resistance on the absorptivity and reflectivity are investigated. The research results show that, by means of the excitation for different plasma resonance ranges, not only the absorption property is improved, but also the tunable absorption spectrum can be obtained. As for the designed electromagnetic absorber, not only the ultra-broadband absorption of TE waves can be realized, but also the polarization splitting of TE and TM waves can be achieved.

关 键 词：材料 等离子体超材料 电磁吸波体 集总电阻 可调谐特性 

分 类 号：O436[机械工程—光学工程]