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"There’s a new kind of twisted light. A rotating “vortex beam” whose twist changes across the length of the beam has been created in the lab for the first time.
Researchers discovered in 1992 that a beam of light could have orbital angular momentum, meaning that the beam twists as it propagates forward, with each photon circling around the centre of the beam.
Now, Kevin Dorney at the University of Colorado Boulder and his colleagues have made light that not only twists, but has a different degree of twist along the length of the beam too."
Researchers discovered in 1992 that a beam of light could have orbital angular momentum, meaning that the beam twists as it propagates forward, with each photon circling around the centre of the beam.
Now, Kevin Dorney at the University of Colorado Boulder and his colleagues have made light that not only twists, but has a different degree of twist along the length of the beam too."
New kind of light is a vortex beam that twists faster as it moves
A laser beam can be twisted and move like a vortex, and for the first time researchers have made one that has different twists along the length of the beam
www.newscientist.com