Non-integral vortex structures in diffracted light beams

S. Baumann; E. J. Galvez

doi:10.1117/12.701638

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9 February 2007 Non-integral vortex structures in diffracted light beams

S. Baumann, E. J. Galvez

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Proceedings Volume 6483, Complex Light and Optical Forces; 64830T (2007) https://doi.org/10.1117/12.701638
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

We study the optical fields produced by non-integral binary forked gratings. We analyze experimentally the phase structure of the light beams by interference. We were able to identify individual optical vortices directly by observing the dislocations in the fringe pattern. Our experimental results agree well with of all the generic features predicted by the theoretical model [M.V. Berry, "Optical vortices evolving from helicoidal and fractional phase steps," J. Opt. A 6, pp. 259-268, 2004.]. Our results underscore the conservation of orbital angular momentum of the light/optical-apparatus system.

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S. Baumann and E. J. Galvez "Non-integral vortex structures in diffracted light beams", Proc. SPIE 6483, Complex Light and Optical Forces, 64830T (9 February 2007); https://doi.org/10.1117/12.701638

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