optical vortex
Technical term in optics and photonics referring to a light beam with a helical phase front and a dark core. Used in research on optical tweezers, quantum optics, and laser manipulation.
Optical vortices are used in research on optical tweezers and quantum information processing.
An optical vortex is generated by passing laser light through a special phase plate.
Compound of 光 (ひかり, 'light') and 渦 (うず, 'vortex'), directly describing the physical phenomenon.