Poincaré-sphere equivalent for light beams containing orbital angular momentum
- 1 April 1999
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 24 (7) , 430-432
- https://doi.org/10.1364/ol.24.000430
Abstract
The polarization state of a light beam is related to its spin angular momentum and can be represented on the Poincaré sphere. We propose a sphere for light beams in analogous orbital angular momentum states. Using the Poincaré-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.Keywords
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