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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 13 — Jun. 23, 2008
  • pp: 9495–9500

Transfer of orbital angular momentum from a super-continuum, white-light beam

Amanda J Wright, John M Girkin, Graham M Gibson, Jonathan Leach, and Miles J Padgett  »View Author Affiliations


Optics Express, Vol. 16, Issue 13, pp. 9495-9500 (2008)
http://dx.doi.org/10.1364/OE.16.009495


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Abstract

Beams with helical phasefronts described by exp(iℓϕ) carry an orbital angular momentum equivalent to ℓh̄ per photon. Using diffractive optics this helical phase structure can be applied to every spectral component of the beam such that a spatially coherent white-light beam can carry orbital angular momentum without any chromatic distortion. This achromatic property can be hard to achieve in spin angular momentum where pure circular polarization is difficult to maintain across a finite spectral bandwidth. We illustrate the achromatic, helical phase structure of a white-light beam by observing the transfer of its orbital angular momentum to particles held in optical tweezers.

© 2008 Optical Society of America

OCIS Codes
(230.6120) Optical devices : Spatial light modulators
(050.4865) Diffraction and gratings : Optical vortices
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: April 17, 2008
Revised Manuscript: June 2, 2008
Manuscript Accepted: June 6, 2008
Published: June 12, 2008

Virtual Issues
Vol. 3, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Amanda J. Wright, John M. Girkin, Graham M. Gibson, Jonathan Leach, and Miles J. Padgett, "Transfer of orbital angular momentum from a super-continuum, white-light beam," Opt. Express 16, 9495-9500 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-13-9495


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