title: Polarization and topological charge conversion of exact optical vortex beams at normal incidence on planar dielectric interfaces.
abstract: We report on the exact resolution of the problem of reflection and refraction of exact circularly polarized Bessel vortex beams impinging at normal incidence on a planar dielectric interface between two isotropic and lossless media. On the one hand, we demonstrate the generation of a new vortex state both in the reflected and refracted fields. On the other hand, we show the possibility to completely convert, at reflection, the incident vortex beam into a vortex beam with orthogonal polarization and topological charge changed by ±2. The spin-orbit interaction of light occurring at the planar interface is identified as the mechanism responsible for these effects.
authors.affiliation: University of Bordeaux, LOMA, UMR 5798, Talence, France. m.yavorsky@loma.u-bordeaux1.fr
authors.forename: Maxim
authors.initials: M
authors.lastname: Yavorsky
authors.forename: Etienne
authors.initials: E
authors.lastname: Brasselet