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.File | Dimensione | Formato | |
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