Antenna surface plasmon emission by inelastic tunneling

Cheng Zhang, Jean-Paul Hugonin, Anne-Lise Coutrot, Christophe Sauvan, François Marquier and Jean-Jacques Greffet ()
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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

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: 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.

Date: 2019
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DOI: 10.1038/s41467-019-12866-3

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