We show that phase properties and the local curvature of a wavefront with orbital angular momentum can be measured by the real part of the complex degree of coherence of radiation obtained with respect to an off-axis fixed point (asymmetric lateral coherence). The method can be implemented by exploiting a scan of double-slits along Cartesian axis. Because the method exploits simple apertures, it can be applied to measure topological and phase properties of stable sources in a wide range of wavelengths from microwaves to x-rays.
Asymmetric lateral coherence of OAM radiation reveals topological charge and local curvature / B. Paroli, A. Cirella, I. Drebot, V. Petrillo, M. Siano, M.A.C. Potenza. - In: JOURNAL OF OPTICS. - ISSN 2040-8978. - 20:7(2018), pp. 075605.1-075605.10.
Titolo: | Asymmetric lateral coherence of OAM radiation reveals topological charge and local curvature |
Autori: | |
Parole Chiave: | coherence; optical vortex; singular optics; Electronic, Optical and Magnetic Materials; Atomic and Molecular Physics, and Optics |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia |
Data di pubblicazione: | 2018 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/2040-8986/aac936 |
Appare nelle tipologie: | 01 - Articolo su periodico |
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