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Opt Lett. 1999 Apr 1;24(7):430-2.

Poincaré-sphere equivalent for light beams containing orbital angular momentum.

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.

PMID:
18071529
DOI:
10.1364/ol.24.000430

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