Graphene-based tunable terahertz plasmon-induced transparency metamaterial.
Graphene-based tunable terahertz plasmon-induced transparency metamaterial.
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DOI：
10.1039/c5nr07114c
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发表时间：
2016-08
期刊：
影响因子：
6.7
通讯作者：
Xiaolei Zhao;Cai Yuan;Lin Zhu;Jianquan Yao
中科院分区：
文献类型：
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作者：
Xiaolei Zhao;Cai Yuan;Lin Zhu;Jianquan Yao
提出了一种由单层石墨烯微结构组成的新型太赫兹等离子体诱导透明（PIT）超材料结构，并对其进行了数值研究。透射谱中出现了明显的透明峰，这是由于石墨烯偶极子天线和单极子天线之间的相消干涉造成的。进一步的研究表明，可以通过调整石墨烯中的费米能级来动态控制透明峰的光谱位置和线形。由于我们设计的结构中的单极天线以连续形式存在，因此与具有离散石墨烯模式的结构相比，通过施加栅极电压可以更方便地实现可调性。这项工作可能为设计可调谐太赫兹功能器件和慢光器件开辟新的途径。
A novel terahertz plasmon induced transparency (PIT) metamaterial structure consisting of single-layered graphene microstructures was proposed and numerically studied in this study. A pronounced transparency peak was obtained in the transmission spectrum, which resulted from the destructive interference between the graphene dipole and monopole antennas. Further investigations have shown that the spectral location and lineshape of the transparency peak can be dynamically controlled by tuning the Fermi level in graphene. Since the monopole antennas in our designed structure exist in a continuous form, a more convenient method for tunablity is available by applying a gate voltage compared to those structures with discrete graphene patterns. This work may open up new avenues for designing tunable terahertz functional devices and slow light devices.