Optical vortices can be identified in the non-local correlations of entangled photon pairs. See also Orbital angular momentum of light References External links Video of propagation simulation of Vortex Diffractive Optical Element from near field to far field by Holo/Or Optical vortices and optical tweezers at the University of Glasgow Singular Optics Master list by Grover Swartzlander Jr., University of Arizona, Tucson Optical vortex coronograph, Gregory Foo, et al., University of Arizona, Tucson Optical tweezers, David Grier, NYU Selected Publications on Optical Vortices at Australian National University Physical optics Orbital angular momentum of waves Vortices