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Optical gating of graphene on photoconductive Fe:LiNbO3

Optical gating of graphene on photoconductive Fe:LiNbO3
Optical gating of graphene on photoconductive Fe:LiNbO3
We demonstrate experimentally non-volatile, all-optical control of graphene's charge transport properties by virtue of a Fe:LiNbO3 photoconductive substrate. The substrate can register and sustain photo-induced charge distributions which modify locally the electrostatic environment of the graphene monolayer and allow spatial control of graphene resistivity. We present light-induced changes of graphene sheet resistivity as high as ∼370 Ω/sq (~ 2.6 fold increase) under spatially non-uniform light illumination. The light-induced modifications in the sheet resistivity are stable at room temperature but can be reversed by uniform illumination, or thermal annealing (100°C for 4 hours) thus restoring graphene's electrical properties to their initial, pre-illumination values. The process can be subsequently repeated by further spatially non-uniform illumination.
graphene, lithium niobate, reconfigurable electronics, doping, 2D materials
1936-0851
5940-5945
Gorecki, Jonathan
7571a01a-8519-411a-b44e-c67a169387e6
Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Gorecki, Jonathan
7571a01a-8519-411a-b44e-c67a169387e6
Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51

Gorecki, Jonathan, Apostolopoulos, Vasileios, Ou, Jun-Yu, Mailis, Sakellaris and Papasimakis, Nikitas (2018) Optical gating of graphene on photoconductive Fe:LiNbO3. ACS Nano, 12 (6), 5940-5945. (doi:10.1021/acsnano.8b02161).

Record type: Article

Abstract

We demonstrate experimentally non-volatile, all-optical control of graphene's charge transport properties by virtue of a Fe:LiNbO3 photoconductive substrate. The substrate can register and sustain photo-induced charge distributions which modify locally the electrostatic environment of the graphene monolayer and allow spatial control of graphene resistivity. We present light-induced changes of graphene sheet resistivity as high as ∼370 Ω/sq (~ 2.6 fold increase) under spatially non-uniform light illumination. The light-induced modifications in the sheet resistivity are stable at room temperature but can be reversed by uniform illumination, or thermal annealing (100°C for 4 hours) thus restoring graphene's electrical properties to their initial, pre-illumination values. The process can be subsequently repeated by further spatially non-uniform illumination.

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OpticalGatingofGraphene_Revision_Formatted_V2 - Accepted Manuscript
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Accepted/In Press date: 17 May 2018
e-pub ahead of print date: 17 May 2018
Published date: 26 June 2018
Keywords: graphene, lithium niobate, reconfigurable electronics, doping, 2D materials

Identifiers

Local EPrints ID: 420995
URI: https://eprints.soton.ac.uk/id/eprint/420995
ISSN: 1936-0851
PURE UUID: dc8d4349-9040-43b0-9efd-f4ff571637f3
ORCID for Vasileios Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191
ORCID for Jun-Yu Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for Sakellaris Mailis: ORCID iD orcid.org/0000-0001-8100-2670
ORCID for Nikitas Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466

Catalogue record

Date deposited: 21 May 2018 16:30
Last modified: 15 Aug 2019 04:12

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