2011/07/28 by Tatyana A. Fadeyeva, C N Alexeyev, Fadeyeva, Tatyana +5
Physics and Astronomy · #FOS: Physical sciences #Nonlinear Photonic Systems #Optics (physics.optics) #Orbital Angular Momentum in Optics #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.1107.5775
openalex publication_date 2011/07/28 · openalex created_date 2022/08/29 · openalex updated_date 2026/07/28
We consider the paraxial propagation of nondiffracting singular beams inside\nnatural biaxial and biaxially-induced birefringent media in vicinity of one of\nthe optical axes in terms of eigenmode vortex-beams, whose angular momentum\ndoes not change upon propagation. We have predicted a series of new optical\neffects in the natural biaxial crystals such as the stable propagation of\nvector singular beams bearing the coupled optical vortices with fractional\ntopological charges, the conversion of the zero-order Bessel beam with a\nuniformly distributed linear polarization into the radially-, azimuthally- and\nspirally-polarized beams and the conversion of the space-variant linear\npolarization in the combined beam with coupled vortices. We have revealed that\nthe field structure of the vortex-beams in the biaxially-induced crystals\nresembles that in the natural biaxial crystals and form the vector structure\ninherent in the conical diffraction. However, the mode beams in this case do\nnot change the propagation direction as it takes place inside natural biaxial\ncrystals.\n