Optically reconfigurable graphene/metal metasurface on Fe:LiNbO3 for adaptive THz optics
Optically reconfigurable graphene/metal metasurface on Fe:LiNbO3 for adaptive THz optics
We demonstrate, experimentally, nonvolatile optical control of terahertz metasurfaces composed of a metallic split-ring resonator array sandwiched between monolayer graphene and a photoconductive Fe:LiNbO3 substrate. We demonstrate frequency-selective tuning of THz transmission amplitude, and our results pave the way toward spatially resolved control of THZ metasurfaces for beam steering, imaging, and sensing applications. The substrate (Fe:LiNbO3) supports nonvolatile yet reversible photoinduced charge distributions, which locally modify the electrostatic environment of the nano-thickness graphene monolayer, altering the graphene electrical conductivity and therefore changing the resonance spectra of the metamaterial array. We present light-induced normalized transmittance changes up to 35% that are nonvolatile and persist after the illumination source is removed yet can be reversed by thermal annealing.
Metamaterials, Terahertz, Lithium Niobate
Gorecki, Jonathan
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Piper, Lewis Kieran
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Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Mailis, Sakellaris
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Papasimakis, Nikitas
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Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Gorecki, Jonathan
7571a01a-8519-411a-b44e-c67a169387e6
Piper, Lewis Kieran
85fa16d7-a404-44c8-a1a3-58aeed164b3d
Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Gorecki, Jonathan, Piper, Lewis Kieran, Noual, Adnane, Mailis, Sakellaris, Papasimakis, Nikitas and Apostolopoulos, Vasileios
(2020)
Optically reconfigurable graphene/metal metasurface on Fe:LiNbO3 for adaptive THz optics.
ACS Applied Nano Materials.
(doi:10.1021/acsanm.0c02243).
Abstract
We demonstrate, experimentally, nonvolatile optical control of terahertz metasurfaces composed of a metallic split-ring resonator array sandwiched between monolayer graphene and a photoconductive Fe:LiNbO3 substrate. We demonstrate frequency-selective tuning of THz transmission amplitude, and our results pave the way toward spatially resolved control of THZ metasurfaces for beam steering, imaging, and sensing applications. The substrate (Fe:LiNbO3) supports nonvolatile yet reversible photoinduced charge distributions, which locally modify the electrostatic environment of the nano-thickness graphene monolayer, altering the graphene electrical conductivity and therefore changing the resonance spectra of the metamaterial array. We present light-induced normalized transmittance changes up to 35% that are nonvolatile and persist after the illumination source is removed yet can be reversed by thermal annealing.
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Restricted to Repository staff only until 7 September 2021.
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Accepted/In Press date: 26 August 2020
e-pub ahead of print date: 7 September 2020
Keywords:
Metamaterials, Terahertz, Lithium Niobate
Identifiers
Local EPrints ID: 443858
URI: http://eprints.soton.ac.uk/id/eprint/443858
PURE UUID: 6e69d364-8f22-4276-8449-171c34775e7c
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Date deposited: 15 Sep 2020 16:30
Last modified: 07 Oct 2020 01:54
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Contributors
Author:
Lewis Kieran Piper
Author:
Adnane Noual
University divisions
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