Transparent Thermally Tunable Microwave Absorber Prototype Based on Patterned VO2 Film

被引:31
作者
Lu, Zhengang [1 ,2 ]
Zhang, Yilei [1 ,2 ]
Wang, Heyan [1 ,2 ]
Xia, Chao [1 ,2 ]
Liu, Yunfei [1 ,2 ]
Dou, Shuliang [3 ]
Li, Yao [3 ]
Tan, Jiubin [1 ,2 ]
机构
[1] Harbin Inst Technol, Ultraprecis Opt & Elect Instrument Engn Ctr, Harbin 150001, Peoples R China
[2] Minist Ind & Informat Technol, Harbin Inst Technol, Key Lab Ultraprecis Intelligent Instrumentat, Harbin 150001, Peoples R China
[3] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China
来源
ENGINEERING | 2023年 / 29卷
基金
中国国家自然科学基金;
关键词
Tunable microwave absorber; VO; 2; film; Optical transparent; Near unity absorption; Large modulation depth; OPTICALLY TRANSPARENT; METAMATERIAL; METASURFACES; LIGHTWEIGHT; FREQUENCY;
D O I
10.1016/j.eng.2022.10.005
中图分类号
T [工业技术];
学科分类号
08 ;
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 (VO2) film. Numerical calculations and experiments demonstrate that the proposed VO2 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 VO2 film duty cycle can change the temperature of near-unity absorption. Our VO2 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. (c) 2022 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
引用
收藏
页码:198 / 206
页数:9
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