Open AccessGouy phase induced polarization transition of focused vector vortex beams
Author(s) -
Yi Zhang,
Xuyue Guo,
Lei Han,
Peng Li,
Sheng Liu,
Hao Cheng,
Jianlin Zhao
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.025725
Subject(s) - polarization (electrochemistry) , physics , optics , femtosecond , vortex , circular polarization , phase transition , optical vortex , polarization rotator , linear polarization , condensed matter physics , laser , beam (structure) , chemistry , birefringence , thermodynamics , microstrip
We propose a common criterion for the effect of Gouy phase on the distinct polarization transition of focused vector vortex beams (VVBs). Such polarization transition is strongly dependent on the parity of the smaller modulus between VVB's polarization order and topological charge. Significantly, the cross polarization transitions are observed at areas where the two spin components with equi-intensity are exactly overlapping and the Gouy phase difference (GPD) between them equals to (2k + 1)π, k is an integer. As a whole, the focal field shows radially variant polarization distributions resulting from the unequal intensity proportion of the two spin components. This polarization transition holds potential in modifying the patterns of periodic surface structure induced by femtosecond vector beams.