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Observation of an x-ray vortex

By Andrew G. Peele, Philip J. McMahon, David Paterson, Chanh Q. Tran, Adrian P. Mancuso, Keith A. Nugent, Jason P. Hayes, Erol Harvey, Barry Lai and Ian McNulty


Phase singularities are a ubiquitous feature of waves of all forms and represent a fundamental aspect of wave topology. An optical vortex phase singularity occurs when there is a spiral phase ramp about a point phase singularity. We report an experimental observation of an optical vortex in a field consisting of 9-kev x-ray photons. The vortex is created with an x-ray optical structure that imparts a spiral phase distribution to the incident wave field and is observed by use of diffraction about a wire to create a division-of-wave-front interferometer

Topics: Coherent light, Diffraction, Excimer lasers, Interferometry, Laser ablation, Light interference, Phase singularities, Photons, Refractive index, Wave effects, 0205 Optical Physics
Publisher: Optical Society of America
Year: 2002
DOI identifier: 10.1364/OL.27.001752
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