Structured light beams with controllable polarization along arbitrary trajectories

https://phys.org/news/2024-06-polarization-arbitrary-trajectories.html

"phase modulation function on input plane, consisting of series of expanding circular rings with moving centers... structured light polarized from 15 to 75° along Poincaré equator, and from 15° to circular polarization and then to 75° along northern hemisphere equator... longitudinally continuously varying polarized spatial structure, phase difference with non-axial transmission of orthogonally polarized components corresponding to moving rings... optical encryption, particle manipulation, biomedical imaging"