Formation of helical beams by use of Pancharatnam-Berry phase optical elements Academic Article uri icon


  • 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 10.6 µm.

publication date

  • January 1, 2002