Perfect vortex beams created via metasurfaces for quantum information processing and particle manipulation

https://www.eurekalert.org/news-releases/1110859

"vortex beams' ring size expands as topological charge (orbital angular momentum) increases hindering use in systems requiring multiple beam superpositions/ bulky & hard to align generation methods (spiral phase plates, axicons)... overcome using metasurface light manipulation creating beams: elliptical/ fractional-order (specialized spatial shaping), multi-channel & concentric-ring (multiple beam parallel generation from 1 surface), grafted (angular momentum non-uniform distributions), optical manipulation/ communication"