可实现宽带吸波稳定性提升的新型电阻等离子吸波结构  

Resistive plasmonic absorbing structures for stability enhancement of broadband absorption

作　　者：沈杨 芦志峰 郭亚坤[1] 龙云飞 何睿 张哲瑞 SHEN Yang;LU Zhi-feng;GUO Ya-kun;LONG Yun-fei;HE Rui;Zhang Zhe-rui(Satellite Maritime Tracking and Controlling Department,Jiangyin 214400,China;Aerospace System Department of Strategic Support Force of the People’s Liberation Army of China,Beijing 100193,China;Nanjing Research Institute of Electronic Technology,Nanjing 210008,China)

机构地区：[1]中国卫星海上测控部,江苏江阴214400 [2]中国人民解放军战略支援部队航天系统部,北京100193 [3]南京电子技术研究所,江苏南京210008

出　　处：《中国光学（中英文）》2024年第3期683-692,共10页Chinese Optics

基　　金：国家自然科学基金资助项目(No.61471388,No.61801509);国家重点研发项目(No.2017YFA0700201)。

摘　　要：电阻型吸波结构具有优异的宽带电磁吸波性能,但电阻片方阻值对吸波结构宽带电磁吸波性能影响较大,且在样品制备过程中较难精确控制。本文通过在电阻型吸波结构表面加载周期性人工等离子结构,利用宽频带内激发的多重等离子谐振,实现高效宽带色散调控,进而获得电阻型吸波材料表面局域场增强效应,提升宽带电磁吸波的稳定性。仿真与试验结果表明,当电阻片方阻值在100~250Ω/sq内变化时,该电阻型等离子吸波结构在7.8~40.0 GHz频段内的吸收效率高于90%以上,具有连续宽带电磁吸波能力。该设计方案提供了一种加载人工等离子结构用于强化吸波超材料综合性能的设计思路,对复合型吸波超材料设计具有一定的启发。Broadband absorption performance in resistive metamaterial absorbers(MA)has always been disturbed by its ohmic sheet element.We propose a comprehensive scheme based on integrating resistive MA and plasmonic structure(PS)to enhance the stable absorption performance.Theoretical investigation indicated that the PS can inspire multi-resonance based on dispersion engineering,and that the localized electric field takes effect on the surface of the ohmic sheet accordingly.Simulation and experimental measurement demonstrated that the proposed resistive plasmonic absorbing structures(PAS)can achieve stable and highly efficient absorption within the frequency band from 7.8 to 40.0 GHz with the ohmic sheet ranging from 100 to 250Ω/sq.In conclusion,the proposed integration of PS and resistive MA provides an efficient pathway to optimize performance for various applications.

关 键 词：超材料吸波体 等离子结构 宽带吸波 色散调控 

分 类 号：TB34[一般工业技术—材料科学与工程]