Manipulation of polarization-dependent multivortices with quasi-periodic subwavelength structures.
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.
Biener
Gabriel
G
Optical Engineering Laboratory, Faculty of Mechanical Engineering, Haifa, Israel.
Gorodetski
Yuri
Y
Niv
Avi
A
Kleiner
Vladimir
V
Hasman
Erez
E