title: Polychromatic vectorial vortex formed by geometric phase elements.
abstract: We propose the use of a geometric phase, obtained by spatial polarization state manipulations, for the formation of polychromatic vectorial vortices. Experimental demonstration is obtained by using Pancharatnam-Berry phase optical elements formed by a space-variant subwavelength grating etched on a GaAs wafer. We further demonstrate formation of scalar and unpolarized polychromatic vortices.
authors.affiliation: Optical Engineering Laboratory, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
authors.forename: Avi
authors.initials: A
authors.lastname: Niv
authors.forename: Gabriel
authors.initials: G
authors.lastname: Biener
authors.forename: Vladimir
authors.initials: V
authors.lastname: Kleiner
authors.forename: Erez
authors.initials: E
authors.lastname: Hasman