Polychromatic vectorial vortex formed by geometric phase elements
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Updated: Jul 16, 2026

High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Avi Niv1, Gabriel Biener, Vladimir Kleiner
1Optical Engineering Laboratory, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
Abstract:
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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