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Plasmon induced thermoelectric effect in graphene

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Title: Plasmon induced thermoelectric effect in graphene
Authors: Shautsova, V
Sidiropoulos, T
Xiao, X
Gusken, N
Black, N
Gilbertson, A
Maier, S
Cohen, L
Oulton, R
Item Type: Journal Article
Abstract: Graphene has emerged as a promising material for optoelectronics due to its potential for ultrafast and broad-band photodetection. The photoresponse of graphene junctions is characterized by two competing photocurrent generation mechanisms: a conventional photovoltaic effect and a more dominant hot-carrier-assisted photothermoelectric (PTE) effect. The PTE effect is understood to rely on variations in the Seebeck coefficient through the graphene doping profile. A second PTE effect can occur across a homogeneous graphene channel in the presence of an electronic temperature gradient. Here, we study the latter effect facilitated by strongly localised plasmonic heating of graphene carriers in the presence of nanostructured electrical contacts resulting in electronic temperatures of the order of 2000 K. At certain conditions, the plasmon-induced PTE photocurrent contribution can be isolated. In this regime, the device effectively operates as a sensitive electronic thermometer and as such represents an enabling technology for development of hot carrier based plasmonic devices.
Issue Date: 5-Dec-2018
Date of Acceptance: 17-Sep-2018
URI: http://hdl.handle.net/10044/1/64942
DOI: https://dx.doi.org/10.1038/s41467-018-07508-z
ISSN: 2041-1723
Publisher: Nature Publishing Group
Journal / Book Title: Nature Communications
Volume: 9
Copyright Statement: © 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
Funder's Grant Number: EP/D063329/1
EP/J014699/1
EP/M013812/1
Keywords: MD Multidisciplinary
Publication Status: Published
Article Number: ARTN 5190
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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