Space-variant Pancharatnam-Berry phase optical elements with computer-generated subwavelength gratings

Opt Lett. 2002 Jul 1;27(13):1141-3. doi: 10.1364/ol.27.001141.

Abstract

Space-variant Pancharatnam-Berry phase optical elements based on computer-generated subwavelength gratings are presented. By continuously controlling the local orientation and period of the grating we can achieve any desired phase element. We present a theoretical analysis and experimentally demonstrate a Pancharatnam-Berry phase-based diffraction grating for laser radiation at a wavelength of 10.6microm.