Five-Band Terahertz Perfect Absorber Based on Metal Layer-Coupled Dielectric Metamaterial
Five-Band Terahertz Perfect Absorber Based on Metal Layer-Coupled Dielectric Metamaterial
复制标题
基于金属层耦合介电超材料的五波段太赫兹完美吸收体
DOI：
10.1007/s11468-019-00956-3
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发表时间：
2019
期刊：
影响因子：
3
通讯作者：
Xiao Shuyuan
中科院分区：
文献类型：
--
作者：
Zhang Yubin;Cen Chunlian;Liang Cuiping;Yi Zao;Chen Xifang;Tang Yongjian;Yi Tao;Yi Yougen;Luo Wei;Xiao Shuyuan
提出了一种基于亚波长范围的五波段可调谐太赫兹理想超材料吸收体。它由反射层、介电层和吸收层组成，吸收层由内部封闭的方形环和外部开放的方形圆组成。我们发现，五个吸收峰平均可达97%以上。同时，为了分析其吸收机理，研究了不同结构和几何参数的吸收体，并绘制了不同峰值处的电场强度图和表面电流密度图。此外，我们还研究了基于这种结构的类似开口结构对吸收的影响。因此，所设计的吸收体具有良好的频率选择性，可应用于太赫兹成像、探测等领域。
A five-band tunable ideal terahertz metamaterial absorber based on subwavelength range is proposed. It consists of a reflective layer, a dielectric layer, and an absorbing layer consisting of an internal closed square ring and an outer open square circle. We have found that the five absorption peaks can reach more than 97% on average. Meanwhile, in order to analyze the absorption mechanism, we studied the different structures and geometric parameters of the absorber and drew the electric field intensity diagram and surface current density diagram at different peaks. Moreover, we also studied the effect of similar opening structures based on this structure on absorption. Therefore, the designed absorber has good frequency selectivity and can be applied to terahertz imaging, detection, and so on.