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Antenna surface plasmon emission by inelastic tunneling

Author

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  • Cheng Zhang

    (Université Paris-Saclay)

  • Jean-Paul Hugonin

    (Université Paris-Saclay)

  • Anne-Lise Coutrot

    (Université Paris-Saclay)

  • Christophe Sauvan

    (Université Paris-Saclay)

  • François Marquier

    (Université Paris-Saclay)

  • Jean-Jacques Greffet

    (Université Paris-Saclay)

Abstract

Surface plasmons polaritons are mixed electronic and electromagnetic waves. They have become a workhorse of nanophotonics because plasmonic modes can be confined in space at the nanometer scale and in time at the 10 fs scale. However, in practice, plasmonic modes are often excited using diffraction-limited beams. In order to take full advantage of their potential for sensing and information technology, it is necessary to develop a microscale ultrafast electrical source of surface plasmons. Here, we report the design, fabrication and characterization of nanoantennas to emit surface plasmons by inelastic electron tunneling. The antenna controls the emission spectrum, the emission polarization, and enhances the emission efficiency by more than three orders of magnitude. We introduce a theoretical model of the antenna in good agreement with the results.

Suggested Citation

  • Cheng Zhang & Jean-Paul Hugonin & Anne-Lise Coutrot & Christophe Sauvan & François Marquier & Jean-Jacques Greffet, 2019. "Antenna surface plasmon emission by inelastic tunneling," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12866-3
    DOI: 10.1038/s41467-019-12866-3
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