Broadband terahertz metamaterial absorber based on tantalum nitride
Broadband terahertz metamaterial absorber based on tantalum nitride
复制标题
基于氮化钽的宽带太赫兹超材料吸收器
DOI：
10.1364/ao.56.002449
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发表时间：
2017-03-20
期刊：
影响因子：
1.9
通讯作者：
Yin, Zhiping
中科院分区：
文献类型：
--
作者：
Deng, Guangsheng;Yang, Jun;Yin, Zhiping
提出了一种具有单层氮化钽（Ta 2N 3）频率选择表面层的宽带超材料吸收体，该频率选择表面层印刷在泡沫基底上。所提出的设计已经在太赫兹区域进行了数值研究。结果表明，在1.17-2.99 THz范围内，该材料具有大于90%的宽带吸收，相对吸收带宽达到112.97%，明显优于以往的研究结果。此外，该吸收体与波的偏振无关，并且在很宽的斜入射范围内实现了高吸收。利用表面电流分布、电场分布和功率损耗分析解释了宽带吸收的物理机制。然而，氮化钽层在能量吸收中具有重要作用。根据所得结果，所提出的吸收体，这是紧凑和简单的设计，有潜在的应用在发展宽带太赫兹吸收器和传感器。(C)2017美国光学学会
A broadband metamaterial absorber with a single layer of tantalum nitride (Ta2N3) frequency selective surface layer, printed on a foam substrate, is presented. The proposed design has been numerically examined at the terahertz region. The results have shown that a wideband absorption with absorptivity greater than 90% was achieved in the frequency range 1.17-2.99 THz, and the relative absorption bandwidth was up to 112.97%, which is significantly better than previously reported results. Moreover, the absorber was independent of wave polarization, and a high absorption for a wide range of oblique incidence was achieved. The surface current distribution, the electric field distributions, and the power loss analyses were used to explain the physical mechanism of a wideband absorption. However, the tantalum nitride layer has an important role in the energy absorption. According to the obtained results, the proposed absorber, which is compact and simple to design, has a potential application in evolving broadband terahertz absorbers and sensors. (C) 2017 Optical Society of America