Formation of helical beams by use of Pancharatnam-Berry phase optical elements.
Spiral phase elements with topological charges based on space-variant Pancharatnam-Berry phase optical elements are presented. Such elements can be achieved by use of continuous computer-generated space-variant subwavelength dielectric gratings. We present a theoretical analysis and experimentally demonstrate spiral geometrical phases for infrared radiation at a wavelength of 10.6microm .
Biener
Gabriel
G
Niv
Avi
A
Kleiner
Vladimir
V
Hasman
Erez
E