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Hotspot-mediated ultrafast nonlinear control of multifrequency plasmonic nanoantennas

Author

Listed:
  • Martina Abb

    (Faculty of Physical Sciences and Engineering, University of Southampton, Highfield)

  • Yudong Wang

    (Faculty of Physical Sciences and Engineering, University of Southampton, Highfield
    Nano Group, Faculty of Physical Sciences and Engineering, University of Southampton, Highfield)

  • C. H. de Groot

    (Nano Group, Faculty of Physical Sciences and Engineering, University of Southampton, Highfield)

  • Otto L. Muskens

    (Faculty of Physical Sciences and Engineering, University of Southampton, Highfield)

Abstract

Plasmonic devices have a unique ability to concentrate and convert optical energy into a small volume. There is a tremendous interest in achieving active control of plasmon resonances, which would enable switchable hotspots for applications such as surface-enhanced spectroscopy and single molecule emission. The small footprint and strong-field confinement of plasmonic nanoantennas also holds great potential for achieving transistor-type devices for nanoscale-integrated circuits. To achieve such a functionality, new methods for nonlinear modulation are required, which are able to precisely tune the nonlinear interactions between resonant antenna elements. Here we demonstrate that resonant pumping of a nonlinear medium in a plasmonic hotspot produces an efficient transfer of optical Kerr nonlinearity between different elements of a multifrequency antenna. By spatially and spectrally separating excitation and readout, isolation of the hotspot-mediated ultrafast Kerr nonlinearity from slower, thermal effects is achieved.

Suggested Citation

  • Martina Abb & Yudong Wang & C. H. de Groot & Otto L. Muskens, 2014. "Hotspot-mediated ultrafast nonlinear control of multifrequency plasmonic nanoantennas," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5869
    DOI: 10.1038/ncomms5869
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