一种基于等离子体超材料的吸波器设计  

Design of an absorber based on plasma metameterial

作　　者：张浩[1] 章海锋 杨靖[1] 刘佳轩 ZHANG Hao;ZHANG Haifeng;YANG Jing;LIU Jiaxuan(Department of Optoelectronic Information Science and Engineering,School of Electronic and Optical Engineering,Nanjing Uni versity of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院光电信息科学与工程系,南京210023

出　　处：《激光技术》2018年第5期704-708,共5页Laser Technology

基　　金：中国博士后特优资助项目(2016T90455);中国博士后面上资助项目(2015M581790);江苏省博士后面上资助项目(1501016A);国家级大学生创新训练计划基金资助项目

摘　　要：为了在TE波下获得可调谐的吸收频谱,设计了一款基于等离子体超材料的吸波器。采用全波仿真方法对该吸波器的吸收率和表面电流图进行了计算,并探讨了结构参量c,v和入射角度θ对吸收率的影响。结果表明,通过激励不同的等离子体谐振区域不但可以改善其吸收特性,而且还能获得可调谐的吸收频谱;改变结构参量c和v可以在实现拓展吸收带宽的同时,使得吸收频域也发生移动;改变入射角度θ的大小对吸收率的影响不大。该吸波器具有很好的角度稳定性。In order to obtain tunable absorption spectra under TE wave, an absorber was designed based on plasmametamaterial. The absorption spectra and the distribution of surface current of the absorbsimulation. The effect of structural parameters c, v and incident angle θ on absorption spectra was alresults demonstrate that not only the tunable absorption spectra can be obtained in the proposed absorber but alsabsorption can be improved by exciting the different plasma resonance structures. Changing the structural parameters of c and v ,the absorption bandwidth can be widened and its location can be tuned at same time. The incident angle θ has little effect on theabsorption spectra. The proposed absorber has good angular stability.

关 键 词：物理光学 等离子体超材料 吸波器 可调谐特性 

分 类 号：O436[机械工程—光学工程] O53[理学—光学]