Subwave spikes of the orbital angular momentum of the vortex-beams in a uniaxial crystal
T. Fadeyeva, C. Alexeyev, A. Rubass, A. Zinov'ev, V. Konovalenko and, A. Volyar
TL;DR
This paper predicts and observes giant spikes in the orbital angular momentum of vortex beams caused by conversion processes in uniaxial crystals, demonstrating conservation of total orbital angular momentum during propagation.
Contribution
It introduces a theoretical prediction and experimental observation of orbital angular momentum spikes in vortex beams within uniaxial crystals, highlighting a novel conversion process.
Findings
Gigantic spikes in orbital angular momentum observed
Orbital angular momentum is conserved during conversion
Conversion process occurs within subwave deviations of crystal length
Abstract
We have theoretically predicted the gigantic spikes of the orbital angular momentum caused by the conversion processes of the centered optical vortex in the circularly polarized components of the elliptic vortex beam propagating perpendicular to the crystal optical axis. We have experimentally observed the conversion process inside the subwave deviations of the crystal length. We have found that the total orbital angular momentum of the wave beam is conserved.
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