4.6 Article

Experimental verification of a plasmonic hook in a dielectric Janus particle

Journal

APPLIED PHYSICS LETTERS
Volume 118, Issue 13, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0043923

Keywords

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Funding

  1. Russian Scientific Foundation [18-79-10195]
  2. Russian Foundation for Basic Research [20-57-S52001]
  3. National Centre for Nano Fabrication and Characterization (DTU Nanolab)
  4. Russian Science Foundation [18-79-10195] Funding Source: Russian Science Foundation

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The research reports the experimental observation of the curved plasmonic beam, known as a plasmonic hook (PH), for surface plasmon-polariton (SPP) waves, achieved by fabricating a cuboid particle with broken shape symmetry. The SPP PH effect demonstrates the smallest curvature of the beam ever recorded for SPPs compared to that for the Airy-family plasmonic beams, potentially impacting various useful applications.
We report on the experimental observation of the curved plasmonic beam, a plasmonic hook (PH), for surface plasmon-polariton (SPP) waves. The SPP PH effect could be obtained with a cuboid particle with broken shape symmetry fabricated with a relatively simple routine. This has a pronounced difference with fabrication of the structure for generation of the Airy SPPs, which require complex techniques to compensate the wave vector mismatch. We confirmed the existence of SPP PH by amplitude scattering scanning near-field optical microscopy. The experimental results agree well with our predictions. Importantly, the SPP PH demonstrates the smallest curvature of the beam ever recorded for SPPs compared to that for the Airy-family plasmonic beams, which potentially can strongly impact many useful applications from nanoparticle manipulation to nanoscale bio-sensing.

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