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Plasmon induced thermoelectric effect in graphene

Author

Listed:
  • Viktoryia Shautsova

    (Imperial College
    University of Oxford)

  • Themistoklis Sidiropoulos

    (Imperial College)

  • Xiaofei Xiao

    (Imperial College)

  • Nicholas A. Güsken

    (Imperial College)

  • Nicola C. G. Black

    (Imperial College
    National Physical Laboratory)

  • Adam M. Gilbertson

    (Imperial College)

  • Vincenzo Giannini

    (Imperial College
    Consejo Superior de Investigaciones Científicas)

  • Stefan A. Maier

    (Imperial College
    Faculty of Physics Ludwig-Maximilians-Universität München)

  • Lesley F. Cohen

    (Imperial College)

  • Rupert F. Oulton

    (Imperial College)

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.

Suggested Citation

  • Viktoryia Shautsova & Themistoklis Sidiropoulos & Xiaofei Xiao & Nicholas A. Güsken & Nicola C. G. Black & Adam M. Gilbertson & Vincenzo Giannini & Stefan A. Maier & Lesley F. Cohen & Rupert F. Oulton, 2018. "Plasmon induced thermoelectric effect in graphene," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07508-z
    DOI: 10.1038/s41467-018-07508-z
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    Cited by:

    1. Fan, Zeng & Zhang, Yaoyun & Pan, Lujun & Ouyang, Jianyong & Zhang, Qian, 2021. "Recent developments in flexible thermoelectrics: From materials to devices," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).

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