Screening and fluctuation of the topological charge in random wave fields

Lorenzo De Angelis, Kobus Kuipers

Research output: Contribution to journalLetterScientificpeer-review

3 Citations (Scopus)

Abstract

Vortices, phase singularities, and topological defects of any kind often reflect information that is crucial for understanding physical systems in which such entities arise. With near-field experiments supported by numerical calculations, we determine the fluctuations of the topological charge for phase singularities in isotropic random waves as a function of the size 푅 of the observation window. We demonstrate that for two-dimensional fields such fluctuations increase with a superlinear scaling law, consistent with a 푅 log 푅 behavior. Additionally, we show that such scaling remains valid in the presence of anisotropy.
Original languageEnglish
Pages (from-to)2740-2743
Number of pages4
JournalOptics Letters
Volume43
Issue number12
DOIs
Publication statusPublished - 4 Jun 2018

Keywords

  • Screening
  • topological defects
  • singular optics
  • singularities
  • random waves
  • chaos
  • wave optics
  • near-field measurement
  • nanoscale optics
  • superdiffusive

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