Gouy phase induced polarization transition of focused vector vortex beams

• DOI: 10.1364/oe.25.025725
• Publication Date: 2017-10-09T16:00:34Z
• Authors: Yi Zhang; Xuyue Guo; Lei Han; Peng Li; Sheng Liu; Huachao Cheng; Jianlin Zhao
• Keywords: Polarization rotator; Optical vortex; Elliptical polarization

We propose a common criterion for the effect of Gouy phase on distinct polarization transition focused vector vortex beams (VVBs). Such is strongly dependent parity smaller modulus between VVB's order and topological charge. Significantly, cross transitions are observed at areas where two spin components with equi-intensity exactly overlapping difference (GPD) them equals to (2k + 1)π, k an integer. As whole, focal field shows radially variant distributions resulting from unequal intensity proportion components. This holds potential in modifying patterns periodic surface structure induced by femtosecond beams.