A Novel Method for PIT Effects Based on Plasmonic Decoupling
Bin Sun1** , Fei-Feng Xie1 , Shuai Kang1 , You-chang Yang1 , Jian-Qiang Liu2
1 Department of Physics, Zunyi Normal College, Zunyi 5630022 College of Science, Jiujiang University, Jiujiang 332005
Abstract ：A tunable dual-band stop-band THz spectrum can be realized in a hybrid structure, which consists of metal nanoribbon arrays clad by graphene nanoribbons. Dual-band spectra can be controlled separately by the nanoribbon width $w$ and graphene chemical potential $\mu_{\rm c}$. We explain that two local plasmonic modes excited at graphene ribbons belong to different gratings, which uncouple with each other by electro-magnetic shielding of the metal ribbons. Furthermore, plasmonic induced transparent (PIT) effects can also be realized by making the two transmission notches close to each other, with better performance than the PIT system based on plasmonic coupling, such as with a larger extinction radio and a tunable transparency window.
收稿日期: 2018-09-03
出版日期: 2018-12-25
:
78.67.Wj
(Optical properties of graphene)
78.20.-e
(Optical properties of bulk materials and thin films)
78.67.Pt
(Multilayers; superlattices; photonic structures; metamaterials)
78.66.-w
(Optical properties of specific thin films)
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2019, Vol. 36 
