加载二氧化钒的太赫兹宽带可调超材料吸波体设计  

Design of Tunable Broadband Metamaterial Absorber Loaded with Vanadium Dioxide in Terahertz Band

作　　者：王连胜[1] 夏冬艳[2] 陈龙溪 付全红[4] 丁学用[1] 汪源[1] WANG Liansheng;XIA Dongyan;CHEN Longxi;FU Quanhong;DING Xueyong;WANG Yuan(School of Science and Technology,Sanya University,Sanya 572022,Hainan,China;School of Finance and Economics,Sanya University,Sanya 572022,Hainan,China;Office of Academic Research,Shandong Youth University of Political Science,Jinan 250103,Shandong,China;School of Science,Northwestern Polytechnical University,Xi’an 710072,Shaanxi,China)

机构地区：[1]三亚学院理工学院,海南三亚572022 [2]三亚学院财经学院,海南三亚572022 [3]山东青年政治学院科研处,山东济南250103 [4]西北工业大学理学院,陕西西安710072

出　　处：《济南大学学报（自然科学版）》2020年第4期402-409,共8页Journal of University of Jinan(Science and Technology)

基　　金：海南省自然科学基金项目(20165200)。

摘　　要：为了实现太赫兹波调制器件对太赫兹波的快速响应,设计一种基于二氧化钒(VO 2)电阻膜的太赫兹波段宽带可调谐超材料吸波体,研究不同温度时吸波体的吸收率,并通过监控表面电流分布,分析吸波体宽带吸收以及可调吸收的机理。结果表明:吸波体在温度为35℃时表现出宽带吸收特性,吸收率大于90%的频段频率为6.508~9.685 THz,带宽为3.177 THz,通过改变温度可以实现吸波体吸收率的调控;该吸波体对电磁波的吸收具有极化不敏感和宽角度吸收的特点。To realize fast response of terahertz wave modulation devices to terahertz wave,a new kind of tunable broadband metamaterial absorber was designed based on the thermally tunable conductivity of vanadium dioxide(VO 2)resistive film in terahertz band.The absorption of absorber at different temperatures were calculated,and the distributions of surface current were monitored to explore the physical mechanism of wideband absorption and absorption adjustment.The results show that the absorption of absorber at 35℃is above 90%from 6.508 THz to 9.685 THz with the bandwidth of 3.177 THz,and it possesses the property of tunable absorption by altering the temperature.The absorption of electro-magnetic by the absorber has the property of polarization-insensitive and wide incident angle.

关 键 词：超材料吸波体 宽带 可调谐 太赫兹 二氧化钒(VO 2)电阻膜 

分 类 号：TB34[一般工业技术—材料科学与工程]