Planar graphene multifunctional component

Abstract

We suggest and investigate theoretically a new graphene electromagnetic tunable multifunctional component for THz region. The structure represents a planar square array of graphene elements placed on both sides of a thin dielectric substrate. By changing electrostatically the graphene chemical potential, the frequency characteristics of the pass‐band and stop‐band filter can be displaced providing a dynamic control of the filter. This property and combination of a high peak and a deep valley in the transmission response allow one to use the component also as a switch in two different frequency controllable bands. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1755–1760, 2015

Multifunctional linear‐polarized terahertz focusing metasurface

“…Multifunctional devices have been realized by recently proposed metasurfaces combined with tunable two‐dimensional material at terahertz frequencies, such as vanadium dioxide (VO 2 ), graphene . In 2018, Bozhevolnyi et al proposed polarization‐insensitive and switchable THz metasurfaces with diversified functionalities that exploit insulator‐to‐metal transition in VO 2 .…”

“…Multifunctional devices have been realized by recently proposed metasurfaces combined with tunable two-dimensional material at terahertz frequencies, such as vanadium dioxide (VO 2 ), 25,26 graphene. 27,28 In 2018, Bozhevolnyi et al proposed polarization-insensitive and switchable THz metasurfaces with diversified functionalities that exploit insulator-to-metal transition in VO 2 . 25 In 2019, a broadband active meta-holography composed of vanadium dioxide (VO 2 ) integrated CSRRs, which enables temperature-dependent dynamic holographic imaging was experimentally demonstrated by Zhang et al 26 In addition to metal structures nested with two-dimensional materials, metasurfaces based on metal and dielectric structure achieving multifunctionality work mainly either in reflection mode, 17,18 or circular polarization mode incidence.…”