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. [10.1088/2040-8986/aac936]

Asymmetric lateral coherence of OAM radiation reveals topological charge and local curvature

B. Paroli
Primo
;
V. Petrillo;M. Siano;M.A.C. Potenza
2018

Abstract

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.
coherence; optical vortex; singular optics; Electronic, Optical and Magnetic Materials; Atomic and Molecular Physics, and Optics
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/613656
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