Dynamically Tunable Plasmon-Induced Transparency Based on Radiative–Radiative-Coupling in a Terahertz Metal–Graphene Metamaterial

New technologies and materials with superior characteristics impel great development of functional devices in the terahertz field. The dynamically tunable plasmon-induced transparency (PIT) based on radiative–radiative-coupling in terahertz hybrid metal–graphene metamaterial is numerically investiga...

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Bibliographic Details
Published in:Crystals (Basel) 2019-03, Vol.9 (3), p.146
Main Authors: Wang, Guanqi, Zhang, Xianbin, Zhang, Lei, Wei, Xuyan
Format: Article
Language:English
Subjects:
Active control
Circuits
Coupling
Electric fields
Energy
Energy dissipation
Graphene
Group delay
Information storage
metamaterial
Metamaterials
Modulation
New technology
Optical properties
plasmon-induced transparency
Resonators
terahertz
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Summary:New technologies and materials with superior characteristics impel great development of functional devices in the terahertz field. The dynamically tunable plasmon-induced transparency (PIT) based on radiative–radiative-coupling in terahertz hybrid metal–graphene metamaterial is numerically investigated in this paper. For the active manipulation of the PIT device, the single-layer graphene is integrated into the proposed structure consisting of the split-ring-resonator (SRR) and the closed-ring-resonator (CRR). Dynamically adjusting Fermi energy in graphene leads to modulation of the PIT window, allowing for the active control of the group delay. From the simulated electrical field distributions and effective circuit model to analyze, the transmission spectrum modulation can be attributed to the altering in the energy loss of the dark mode resonator through the conduction effect of the graphene layer. Our work offers theoretical references for the development of slow light terahertz devices in the future.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst9030146