Light trajectory in Bessel-Gauss vortex beams.
Fiche publication
Date publication
juillet 2015
Auteurs
Membres identifiés du Cancéropôle Est :
Dr FROEHLY Luc
Tous les auteurs :
Xie C, Giust R, Jukna V, Furfaro L, Jacquot M, Lacourt PA, Froehly L, Dudley J, Couairon A, Courvoisier F
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Résumé
We investigate the early stage of propagation of Bessel-Gauss vortex beams where a transition regime shows a progressive lateral expansion of the main intensity ring before reaching a diffraction-free regime. The eikonal equation is used to characterize the beam structure. The beam is featured by a family of hyperboloids with variable waists, generating a tapered tubular caustic. Our analytical results are in excellent agreement with numerical and experimental results. We show the transition regime can be well eliminated by using hollow input beams.
Référence
J Opt Soc Am A Opt Image Sci Vis. 2015 Jul 1;32(7):1313-6