Tunable plasmon-induced transparency in H-shaped Dirac semimetal metamaterial.
Tunable plasmon-induced transparency in H-shaped Dirac semimetal metamaterial.
复制标题
DOI：
10.1364/ao.57.000752
复制
发表时间：
2018-02
期刊：
影响因子：
1.9
通讯作者：
Huan Chen;Huiyun Zhang;Xiaohan Guo;Shande Liu;Yuping Zhang
中科院分区：
文献类型：
--
作者：
Huan Chen;Huiyun Zhang;Xiaohan Guo;Shande Liu;Yuping Zhang
对狄拉克半金属(称为“三维石墨烯”)超材料在太赫兹频率下实现可调谐等离子体诱导透明(PIT)效应进行了数值和理论研究。模拟结果表明，凹坑效应是由于结构对称性破缺而从中心带向边带转移的电场所致。最突出的特点是可以通过改变费米能量来主动调谐狄拉克半金属中的等离子体共振，并且在我们所提出的设计中获得了大约6.81ps的超高群延迟。我们的研究可以为实际应用中的各种太赫兹器件提供指导。
We present a numerical and theoretical study on the realization of tunable plasmon-induced transparency (PIT) effect at terahertz frequencies in Dirac semimetal (known as "three-dimensional graphene") metamaterials. Simulations reveal that the PIT effect is generated by an electric field transferred from the central strip to side strips due to the structural symmetry breaking. The most prominent feature is that the plasmonic resonance in Dirac semimetals can be actively tuned by changing the Fermi energy and an ultrahigh group delay of about 6.81 ps is obtained in our proposed design. Our study can provide guidance for various terahertz devices in practical applications.