title: Manipulation of polarization-dependent multivortices with quasi-periodic subwavelength structures.
abstract: Multiple vortices with different topological charges are formed by the use of two sequential geometric phase elements. These elements are realized by quasi-periodic subwavelength gratings. The first element is a spiral phase element and the second element is a spherical phase element. We provide a theoretical analysis and an experimental demonstration of the formation of the multiple vortices that comprise scalar vortices and a vectorial vortex.
authors: Optical Engineering Laboratory, Faculty of Mechanical Engineering, Haifa, Israel.
authors: Gabriel
authors: G
authors: Biener
authors: Yuri
authors: Y
authors: Gorodetski
authors: Avi
authors: A
authors: Niv
authors: Vladimir
authors: V
authors: Kleiner
authors: Erez
authors: E
authors: Hasman