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Optical twisters: beams having twists in both phase and amplitude

Daria, Vincent; Palima, Darwin; Gluckstad, Jesper


We describe a diffracting beam with orbital angular momentum (OAM) but with a helical profile in both phase and amplitude components of the beam. This is different from Laguerre-Gaussian (LG) beams where only the phase component has a helical profile. Such profile in LG beams introduces a phase singularity at the centre and produces a dark region surrounded by a ring-shaped light pattern. For LG-beams, the ring radius is proportional to the degree of helicity or topological charge of the beam....[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Conference paper
Source: Proceedings of SPIE Vol 7613: Complex Light and Optical Forces
DOI: 10.1117/12.841527


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