Screening and fluctuation of the topological charge in random wave fields

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 p...

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Veröffentlicht in:	Optics letters 2018-06, Vol.43 (12), p.2740-2743
Hauptverfasser:	De Angelis, L, Kuipers, L
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropy Random waves Scaling laws Singularities Variation
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creator	De Angelis, L Kuipers, L
description	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 R of the observation window. We demonstrate that for two-dimensional fields such fluctuations increase with a superlinear scaling law, consistent with a R log R behavior. Additionally, we show that such scaling remains valid in the presence of anisotropy.
doi_str_mv	10.1364/OL.43.002740
format	Article
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source	Optica Publishing Group Journals
subjects	Anisotropy Random waves Scaling laws Singularities Variation
title	Screening and fluctuation of the topological charge in random wave fields
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