The University of Southampton
University of Southampton Institutional Repository

Optically reconfigurable graphene/metal metasurface on Fe:LiNbO3 for adaptive THz optics

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
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
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), 9494-9501. (doi:10.1021/acsanm.0c02243).

Record type: Article

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
Restricted to Repository staff only until 7 September 2021.
Request a copy

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
ORCID for Jonathan Gorecki: ORCID iD orcid.org/0000-0001-9205-2294
ORCID for Nikitas Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466
ORCID for Vasileios Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 15 Sep 2020 16:30
Last modified: 22 Apr 2021 01:59

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×