Fig. 12: Exotic SU(2) structured multi-singularity VBs.
From: Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities
Theoretical and experimental investigations of special multi-singularity VBs: a trochoidal vortex modes95, b the vortex SU(2) GM204, and c polygonal VBs96. a Reprinted with permission from ref. 95. Copyright (2019) by the American Physical Society. b Reprinted with permission from ref. 204, OSA Publishing. c © (2019) IEEE. Reprinted, with permission, from ref. 96
