材料科学
地平面
太赫兹辐射
超材料
丝带
超材料吸收剂
光电子学
平方(代数)
宽带
极化(电化学)
电介质
光学
带隙
吸收(声学)
可调谐超材料
物理
电信
物理化学
复合材料
几何学
化学
计算机科学
数学
天线(收音机)
作者
Haiyu Meng,Lingling Wang,Xiang Zhai,Guidong Liu,Shengxuan Xia
出处
期刊:Plasmonics
[Springer Nature]
日期:2017-01-23
卷期号:13 (1): 269-274
被引量:37
标识
DOI:10.1007/s11468-017-0509-1
摘要
We present a multi-band terahertz absorber formed by periodic square metallic ribbon with T-shaped gap and a metallic ground plane separated by a dielectric layer. It is demonstrated that absorption spectra of the proposed structure consist of four absorption peaks located at 1.12, 2.49, 3.45, and 3.91 THz with high absorption coefficients of 98.0, 98.9, 98.7, and 99.6%, respectively. It is demonstrated that the proposed absorber has the tunability from single-band to broadband by changing the length of square metallic ribbon and we can also select or tune the frequencies which we want to use by changing polarization angles. Importantly, the quality factor Q at 3.91 THz is 30.1, which is 5.6 times higher than that of 1.12 THz. These results indicate that the proposed absorber has a promising potential for devices, such as detection, sensing, and imaging.
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