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Proceedings Paper

Non-integral vortex structures in diffracted light beams
Author(s): S. Baumann; E. J. Galvez
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Paper 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.

Paper Details

Date Published: 9 February 2007
PDF: 8 pages
Proc. SPIE 6483, Complex Light and Optical Forces, 64830T (9 February 2007); doi: 10.1117/12.701638
Show Author Affiliations
S. Baumann, Colgate Univ. (United States)
E. J. Galvez, Colgate Univ. (United States)

Published in SPIE Proceedings Vol. 6483:
Complex Light and Optical Forces
David L. Andrews; Enrique J. Galvez; Gerard Nienhuis, Editor(s)

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