摘要
提出了由石墨烯和两对对称开口谐振环构成的等离激元诱导透明(PIT)超材料结构,该PIT超材料结构之间的耦合形式为暗-亮-暗模式.通过有限元方法模拟,观察到双PIT透明窗口,通过改变石墨烯的费米能级或者改变开口谐振环的几何参数来动态地调制PIT窗口.理论结果表明,当石墨烯与两对对称的开口谐振环之间的相互作用距离为0.5μm、石墨烯费米能级为1.5eV时,可得到最优的双透明窗口.双PIT效应在非线性器件、可调谐传感器、开关和慢光器件等方面有潜在的应用价值.
A Plasmon-Induced Transparency（PIT）metamaterial was proposed comprised of a graphene patch and two pairs of split ring resonators（SRRs）symmetrically.The coupled PIT molecule is termed as dark-bright-dark molecule.By using the finite element method simulation,the PIT metamaterial exhibits double sharp-induced transparency peaks was observed.the PIT windows can be dynamically modulated at the terahertz regime by tuning the Fermi energy in graphene and varying the geometric parameters of the metamaterial.Theoretical calculations show thatthe interaction distance between graphene and two pairs of symmetrically SRRs is 0.5 microns and the graphene Fermi level is 1.5eV,the optimal double transparent window is obtained.The PIT effects may have some potential applications in nonlinear devices,tunable sensors,switches,and slow light devices.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2017年第8期109-117,共9页
Acta Photonica Sinica
基金
The National Natural Science Foundation of China(No.11204170)
关键词
超材料
太赫兹
石墨烯
类电磁感应透明
Metamaterial
Terahertz
Graphene
Plasmon-induced transparency
