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The polarization state of a light beam is related ta its spin angular momentum and can be represented on the Poincare sphere. We propose a sphere for light beams in analogous orbital angular momentum states. Using the Poincare-sphere equivalent, we interpret the rotational frequency shift for light beams with orbital angular momentum [Phys. Rev. Lett. 80, 3217 (1998)] as a dynamically evolving geometric phase.
|Glasgow Author(s):||Padgett, Prof Miles|
|Authors:||Padgett, MJ, and Courtial, J|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Optics Letters|
|Journal Abbr.:||Opt. Lett.|