Researchers propose a perfect novel optical vortex with controllable impulse ring profile

An optical vortex is identified as a phase singularity encircled with helical wavefront, and thanks to its unique properties, including carried orbital angular momentum (OAM) associated with donut-shaped profiles, it has found exciting applications in stimulated emission depletion (STED) nanoscopy, optical manipulation, both quantum and classical OAM-multiplexing optical communications, enhanced optical imaging, and recently in high-intense vortex physics, etc. However, the size of the donut-sha...