Tunable ultrawideband perfect absorber based on vanadium dioxide

被引：4
作者：
Cheng, Yu [1 ,2 ]
Gao, Qichao [1 ,2 ]
Chen, Ming [1 ,2 ]
Deng, Shijie [1 ,2 ]
Liu, Houquan [1 ,2 ]
Teng, Chuanxin [1 ,2 ]
Yang, Hongyan [1 ,2 ]
Deng, Hongchang [1 ,2 ]
Yuan, Libo [1 ,2 ]
机构：
[1] Guilin Univ Elect Technol, Sch Optoelect Engn, Guilin, Peoples R China
[2] Guilin Univ Elect Technol, Guangxi Key Lab Optoelect Informat Proc, Guilin, Peoples R China
来源：
OPTICAL ENGINEERING | 2023年 / 62卷 / 02期
关键词：
metamaterials; ultrawideband; vanadium dioxide; absorber; TERAHERTZ METAMATERIAL ABSORBER; BROAD-BAND; DUAL-BAND;
D O I：
10.1117/1.OE.62.2.027104
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An ultrawideband metamaterial perfect absorber based on vanadium dioxide is proposed. It achieves > 95% absorption of vertically incident electromagnetic waves in the range of 3.50 to 10 THz. The absorption intensity can be dynamically adjusted in the range of 0.2% to 99.98% by varying the conductivity of VO2. The mechanism of ultrawideband perfect absorption is interpreted using electric field distribution analysis and impedance-matching theory. The absorption rate related to the structural parameters of the absorber is investigated by numerical simulation. Finally, its polarization angle-insensitive and incidence angle-insensitive properties are demonstrated. This proposed absorber has potential applications in optical switching, electromagnetic stealth, and sensing applications.
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页数：9
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