Transparent Thermally Tunable Microwave Absorber Prototype Based on Patterned VO2 Film  

作　　者：Zhengang Lu Yilei Zhang Heyan Wang Chao Xia Yunfei Liu Shuliang Dou Yao Li Jiubin Tan 

机构地区：[1]Ultra-Precision Optical and Electronic Instrument Engineering Center,Harbin Institute of Technology,Harbin 150001,China [2]Key Laboratory of Ultra-Precision Intelligent Instrumentation(Harbin Institute of Technology),Ministry of Industry and Information Technology,Harbin 150001,China [3]Center for Composite Material and Structure,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Engineering》2023年第10期198-206,共9页工程（英文）

基　　金：support from the National Natural Science Foundation of China(61975046)。

摘　　要：Transparent microwave absorbers that exhibit high optical transmittance and microwave absorption capability are ideal,although having a fixed absorption performance limits their applicability.Here,a simple,transparent,and thermally tunable microwave absorber is proposed,based on a patterned vanadium dioxide(VO_(2))film.Numerical calculations and experiments demonstrate that the proposed VO_(2)absorber has a high optical transmittance of 84.9%at 620 nm;its reflection loss at 15.06 GHz can be thermally tuned from–4.257 to–60.179 dB,and near-unity absorption is achieved at 523.750 K.Adjusting only the patterned VO_(2)film duty cycle can change the temperature of near-unity absorption.Our VO_(2)absorber has a simple composition,a high optical transmittance,a thermally tunable microwave absorption performance,a large modulation depth,and an adjustable temperature tuning range,making it promising for application in tunable sensors,thermal emitters,modulators,thermal imaging,bolometers,and photovoltaic devices.

关 键 词：Tunable microwave absorber VO_(2)film Optical transparent Near unity absorption Large modulation depth 

分 类 号：TB383.2[一般工业技术—材料科学与工程]