Polarization dependent focusing lens by use of quantized Pancharatnam-Berry phase diffractive optics

Quantized Pancharatnam-Berry phase diffractive optics using computer-generated space-variant subwavelength dielectric grating is presented. The formation of the geometrical phase is done by discrete orientation of the local subwavelength grating. We discuss a theoretical analysis and experimentally demonstrate a quantized geometrical blazed phase of polarization diffraction grating, as well as polarization dependent focusing lens for infrared radiation at wavelength 10.6 mum. (C) 2003 American Institute of Physics.