Tunable broadband terahertz polarizer using graphene-metal hybrid metasurface | Zendy

Meng Kang | Zendy; S. J. Park | Zendy; Lianhe Li | Zendy; David R. Bacon | Zendy; L. Chen | Zendy; Kwanbyung Chae | Zendy; J. Y. Park | Zendy; Andrew Burnett | Zendy; E. H. Linfield | Zendy; A. G. Davies | Zendy; J. E. Cunningham | Zendy

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Tunable broadband terahertz polarizer using graphene-metal hybrid metasurface

Author(s) -

Meng Kang,

S. J. Park,

Lianhe Li,

David R. Bacon,

L. Chen,

Kwanbyung Chae,

J. Y. Park,

Andrew Burnett,

E. H. Linfield,

A. G. Davies,

J. E. Cunningham

Publication year - 2019

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.033768

Subject(s) - terahertz radiation , polarizer , graphene , materials science , plasmon , optics , optoelectronics , terahertz spectroscopy and technology , drude model , broadband , electromagnetic radiation , polarization (electrochemistry) , birefringence , physics , nanotechnology , chemistry

We demonstrate an electrically tunable polarizer for terahertz (THz) frequency electromagnetic waves formed from a hybrid graphene-metal metasurface. Broadband (>3 THz) polarization-dependent modulation of THz transmission is demonstrated as a function of the graphene conductivity for various wire grid geometries, each tuned by gating using an overlaid ion gel. We show a strong enhancement of modulation (up to ∼17 times) compared to graphene wire grids in the frequency range of 0.2-2.5 THz upon introduction of the metallic elements. Theoretical calculations, considering both plasmonic coupling and Drude absorption, are in good agreement with our experimental findings.

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