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We present a technique to determine the charge of a complex amplitude by extracting its Fourier-Bessel descriptors. The Cartesian signal is transformed to the polar frequency domain through the Fourier-Bessel Transform and analyzed.
The rotation of Poynting vector in dipole vortex beam (DVB) during propagation has been experimentally detected in a knife edge test. The dipole vortex beam is generated, when a collimated laser beam is incident on a phase mask, displayed on spatial light modulator (SLM) in reflection mode. The knife edge test reveals dipole configurations through strikingly distinct intensity intrusions in the geometrical...
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