We present a novel method for forming linearly polarized axially symmetric beams with various polarization orders that is based on computer-generated space-variant subwavelength gratings. We introduce and experimentally demonstrate that our space-variant polarization state manipulations are accompanied by a phase modification of a helical structure that results from the Pancharatnam–Berry phase. We have verified the polarization properties of our gratings for laser radiation at 10.6-μm wavelength.
© 2003 Optical Society of America
(050.1960) Diffraction and gratings : Diffraction theory
(050.2770) Diffraction and gratings : Gratings
(230.5440) Optical devices : Polarization-selective devices
(260.5430) Physical optics : Polarization
Avi Niv, Gabriel Biener, Vladimir Kleiner, and Erez Hasman, "Formation of linearly polarized light with axial symmetry by use of space-variant subwavelength gratings," Opt. Lett. 28, 510-512 (2003)