Surface-plasmon vortices in nanostructured metallic films

  • A. A. Ezhov
  • S. A. Magnitskii
  • N. S. Maslova
  • D. A. Muzychenko
  • A. A. Nikulin
  • V. I. Panov
Condensed Matter

Abstract

Light scattering by a small protrusion on a metal surface is analyzed within the framework of perturbation theory. Upon normal incidence of a linearly polarized monochromatic wave, slight deviations of the protrusion’s shape from a circularly symmetric one lead to the formation of optical vortices in the near-field region due to resonant excitation of circular surface plasmons. This agrees with the results of scanning near-field optical microscopy experiments revealing distinct spiral patterns in the in-plane near-field intensity distribution for metallized nanostructured polymer substrates.

PACS numbers

74.50.+r 74.80.Fp 

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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • A. A. Ezhov
    • 1
  • S. A. Magnitskii
    • 1
  • N. S. Maslova
    • 1
  • D. A. Muzychenko
    • 1
  • A. A. Nikulin
    • 1
  • V. I. Panov
    • 1
  1. 1.Department of PhysicsMoscow State UniversityMoscowRussia

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