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.
Lithium Niobate, Metamaterials, Terahertz
9494-9501
Gorecki, Jonathan
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Piper, Lewis Kieran
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Noual, Adnane
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Mailis, Sakellaris
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Papasimakis, Nikitas
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Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
25 September 2020
Gorecki, Jonathan
6f68dd34-2d89-4063-baf6-8bb6cf8ccfe8
Piper, Lewis Kieran
85fa16d7-a404-44c8-a1a3-58aeed164b3d
Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Mailis, Sakellaris
9fcc2cc8-9c00-452e-b785-a20263cfb33b
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, 3 (9), .
(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.
Text
OptReconfigMetasurf_Manuscript
- Accepted Manuscript
More information
Accepted/In Press date: 26 August 2020
e-pub ahead of print date: 7 September 2020
Published date: 25 September 2020
Keywords:
Lithium Niobate, Metamaterials, Terahertz
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: 17 Mar 2024 05:52
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Contributors
Author:
Jonathan Gorecki
Author:
Lewis Kieran Piper
Author:
Adnane Noual
Author:
Sakellaris Mailis
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