Optically defined reconfigurable THz metasurfaces using graphene on iron‐doped lithium niobate
Optically defined reconfigurable THz metasurfaces using graphene on iron‐doped lithium niobate
Graphene plasmonic devices have been demonstrated to show great potential for reconfigurable metasurfaces due to the tuneable electronic charge transport properties of graphene in response to electrostatic gating. Iron-doped lithium niobate is proposed as a platform for patterning-free optically reconfigurable graphene metasurfaces in the THz spectral region. Under structured illumination, the lithium niobate undergoes charge migration in the bulk, where carriers migrate away from illuminated regions, forming spatially patterned charge distributions capable of electrostatic tuning of graphene. These charge distributions are stable in the dark, however, can be redefined by subsequent illumination. Through the use of numerical simulations, it is demonstrated that optically defined charge distributions in lithium niobate can tune locally the graphene Fermi level allowing for plasmonic resonances at THz frequencies.
Gorecki, Jon
6f68dd34-2d89-4063-baf6-8bb6cf8ccfe8
Noual, Adnane
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Mailis, Sakellaris
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Apostolopoulos, Vasilis
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Papasimakis, Nikitas
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8 December 2022
Gorecki, Jon
6f68dd34-2d89-4063-baf6-8bb6cf8ccfe8
Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Apostolopoulos, Vasilis
8a898740-4c71-4040-a577-9b9d70530b4d
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Gorecki, Jon, Noual, Adnane, Mailis, Sakellaris, Apostolopoulos, Vasilis and Papasimakis, Nikitas
(2022)
Optically defined reconfigurable THz metasurfaces using graphene on iron‐doped lithium niobate.
Advanced Photonics Research, 3 (12), [2200233].
(doi:10.1002/adpr.202200233).
Abstract
Graphene plasmonic devices have been demonstrated to show great potential for reconfigurable metasurfaces due to the tuneable electronic charge transport properties of graphene in response to electrostatic gating. Iron-doped lithium niobate is proposed as a platform for patterning-free optically reconfigurable graphene metasurfaces in the THz spectral region. Under structured illumination, the lithium niobate undergoes charge migration in the bulk, where carriers migrate away from illuminated regions, forming spatially patterned charge distributions capable of electrostatic tuning of graphene. These charge distributions are stable in the dark, however, can be redefined by subsequent illumination. Through the use of numerical simulations, it is demonstrated that optically defined charge distributions in lithium niobate can tune locally the graphene Fermi level allowing for plasmonic resonances at THz frequencies.
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Advanced Photonics Research - 2022 - Gorecki
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e-pub ahead of print date: 30 October 2022
Published date: 8 December 2022
Identifiers
Local EPrints ID: 481816
URI: http://eprints.soton.ac.uk/id/eprint/481816
ISSN: 2699-9293
PURE UUID: 1500335d-79f4-420b-9cd7-99dcd8eb5ad2
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Date deposited: 08 Sep 2023 16:49
Last modified: 18 Mar 2024 03:57
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