Open AccessFlexible modulation of plasmon-induced transparency in a strongly coupled graphene grating-sheet system
Author(s) -
Wenqi Luo,
Wei Cai,
Yuanjiang Xiang,
Lei Wang,
Mengxin Ren,
Xinzheng Zhang,
Jingyi Xu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005784
Subject(s) - plasmon , electromagnetically induced transparency , graphene , grating , materials science , optoelectronics , transparency (behavior) , slow light , optics , modulation (music) , surface plasmon , coupling (piping) , photonics , photonic crystal , nanotechnology , physics , political science , acoustics , law , metallurgy
General actively tunable near-field plasmon-induced transparency (PIT) systems based on couplings between localized plasmon resonances of graphene nanostructures not only suffer from interantenna separations of smaller than 20 nm, but also lack switchable effect about the transparency window. Here, the performance of an active PIT system based on graphene grating-sheet with near-field coupling distance of more than 100 nm is investigated in mid-infrared. The transparency window in spectrum is analyzed objectively and proved to be more likely stemmed from Aulter-Townes splitting. The proposed system exhibits flexible tunability in slow-light and electro-optical switches, promising for practical active photonic devices.