Visualization 3: Ray-optical Poincaré sphere for structured Gaussian beams

Connection between a curve over the Poincaré sphere and elliptic orbits of rays. The bottom left figure shows the rays for the beam in question, while the one on the right shows the rays for the equivalent beam with opposite OAM. Originally published in Optica on 20 April 2017 (optica-4-4-476)