June 27, 2002
Glasgow scientists have measured a single photon’s orbital angular momentum for the first time. The research could lead to speeding up optical communications by allowing each photon sent over fiber optic lines to encode multiple bits as quantum orbital states.
Measuring the Orbital Angular Momentum of a Single Photon, Phys. Rev. Lett. 88, 257901 (2002) (June 24, 2002)