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Proceedings Article

Non-integral vortex structures in diffracted light beams

[+] Author Affiliations
S. Baumann, E. J. Galvez

Colgate Univ.

Proc. SPIE 6483, Complex Light and Optical Forces, 64830T (February 09, 2007); doi:10.1117/12.701638
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From Conference Volume 6483

  • Complex Light and Optical Forces
  • David L. Andrews; Enrique J. Galvez; Gerard Nienhuis
  • San Jose, CA | January 20, 2007

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.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

S. Baumann and E. J. Galvez
"Non-integral vortex structures in diffracted light beams", Proc. SPIE 6483, Complex Light and Optical Forces, 64830T (February 09, 2007); doi:10.1117/12.701638; http://dx.doi.org/10.1117/12.701638


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