Niv Avi, Biener Gabriel, Kleiner Vladimir, Hasman Erez
Optical Engineering Laboratory, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
Opt Lett. 2007 Apr 1;32(7):847-9. doi: 10.1364/ol.32.000847.
We propose the use of a geometric phase, obtained by spatial polarization state manipulations, for the formation of polychromatic vectorial vortices. Experimental demonstration is obtained by using Pancharatnam-Berry phase optical elements formed by a space-variant subwavelength grating etched on a GaAs wafer. We further demonstrate formation of scalar and unpolarized polychromatic vortices.
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