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Active control of broadband plasmon-induced transparency in terahertz hybrid metal-graphene metamaterial

By Zhaojian Zhang, Junbo Yang, Xin He, Yunxin Han, Jingjing Zhang, Jie Huang, Dingbo Chen and Siyu Xu

Abstract

A hybrid metal-graphene metamaterial (MM) is reported to achieve the active control of the broadband plasmon-induced transparency (PIT) in THz region. The unit cell consists of one cut wire (CW), four U-shape resonators (USRs) and monolayer graphene sheets under the USRs. Via near-field coupling, broadband PIT can be produced through the interference between different modes. Based on different arrangements of graphene positions, not only can we achieve electrically switching the amplitude of broadband PIT, but also can realize modulating the bandwidth of the transparent window. Simultaneously, both the capability and region of slow light can be dynamically tunable. This work provides schemes to manipulate PIT with more degrees of freedom, which will find significant applications in multifunctional THz modulation

Topics: Physics - Optics
Publisher: 'Royal Society of Chemistry (RSC)'
Year: 2018
DOI identifier: 10.1039/c8ra04329a
OAI identifier: oai:arXiv.org:1806.00167

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