Ultra-Broadband, Tunable, and Transparent Microwave Meta-Absorber Using ITO and Water Substrate

被引:29
作者
Ge, Jiahao [1 ,2 ,3 ]
Zhang, Yaqiang [1 ,3 ]
Li, Haonan [1 ,2 ,3 ]
Dong, Hongxing [1 ,3 ,4 ]
Zhang, Long [1 ,3 ,4 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China
[4] CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China
基金
上海市自然科学基金; 中国国家自然科学基金;
关键词
metasurface absorbers; ultra-broadband microwave absorption; dynamic tunability; optical transparency; WIDE-BAND; OPTICALLY TRANSPARENT; FERRITE;
D O I
10.1002/adom.202202873
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Integrating broadband absorption, dynamic tunability, and high optical transparency into a single microwave absorber remains a crucial challenge. Here, an ultra-broadband, tunable, and transparent microwave meta-absorber comprising double-layer indium tin oxide resonant patterns and a water-based substrate is theoretically presented and experimentally demonstrated. Experimental measurements indicate that the designed meta-absorber can achieve over 90% absorption in an ultra-broadband frequency range of 12.49-98.21 GHz with a relative bandwidth of 154.9%, while the average optical transmittance is 60.49%. In addition, a multiple reflections interference model is employed to elucidate the physical mechanisms of the ultra-broadband absorber. Furthermore, its absorption performance can be reversibly switched between ultra-broadband and dual-broadband by altering the water substrate thickness. These peculiar properties make the proposed meta-absorber more favorable for practical applications in modern stealth materials and optical windows.
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页数:9
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