材料科学
超材料吸收剂
光学
宽带
掩蔽
极化(电化学)
氧化铟锡
宽带
阻抗匹配
摩尔吸收率
光电子学
平面的
超材料
电阻抗
带宽(计算)
可调谐超材料
图层(电子)
物理
电信
复合材料
计算机图形学(图像)
物理化学
化学
量子力学
计算机科学
作者
Zhiqiang Du,Jian‐Gang Liang,Tong Cai,Xin Wang,Qingdong Zhang,Taowu Deng,Borui Wu,Ruiqi Mao,Dengpan Wang
出处
期刊:Optics Express
[The Optical Society]
日期:2021-02-16
卷期号:29 (5): 6434-6434
被引量:29
摘要
Absorbers have high potential application values in the military field, such as electronic screening, radar cross-section reduction and invisible cloaking. However, most methods have the defects of narrow bandwidth, low absorptivity, complex three-dimensional structure and fixed polarizations. In this paper, we realize an ultra-broadband and full-polarization planar metamaterial absorber (PMA) with a three-layer composite structure, which exhibits multi-resonant and impedance matching properties by combining the ultra-light foams and indium tin oxide (ITO) films. The bottom two layers achieve a high-efficiency absorption rate at the low and medium spectrum, while the upper layer realizes a absorption property at a high frequency. Also, an equivalent circuit model is extracted to explain its operating mechanism. The experimental results show that our meta-absorber can achieve great absorber performance of better than 90% within 1-18 GHz for full-polarization incident waves, which is in great agreement with the numerical simulations. Moreover, our device is insensitive to oblique incidences and polarizations and possesses the physical characteristics of an ultralight, weighing 0.6 kg for a square meter, which is only 1/85.0-1/126.7 of the conventional absorbers under the same size. All these excellent performances determine that our research can be a good candidate for military stealth materials.
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