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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 2 — Jan. 21, 2008
  • pp: 993–1006

Light beams with fractional orbital angular momentum and their vortex structure

Jörg B. Götte, Kevin O’Holleran, Daryl Preece, Florian Flossmann, Sonja Franke-Arnold, Stephen M. Barnett, and Miles J. Padgett  »View Author Affiliations


Optics Express, Vol. 16, Issue 2, pp. 993-1006 (2008)
http://dx.doi.org/10.1364/OE.16.000993


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Abstract

Light emerging from a spiral phase plate with a non-integer phase step has a complicated vortex structure and is unstable on propagation. We generate light carrying fractional orbital angular momentum (OAM) not with a phase step but by a synthesis of Laguerre-Gaussian modes. By limiting the number of different Gouy phases in the superposition we produce a light beam which is well characterised in terms of its propagation. We believe that their structural stability makes these beams ideal for quantum information processes utilising fractional OAM states.

© 2008 Optical Society of America

OCIS Codes
(090.1760) Holography : Computer holography
(230.6120) Optical devices : Spatial light modulators
(270.0270) Quantum optics : Quantum optics
(350.5030) Other areas of optics : Phase
(050.4865) Diffraction and gratings : Optical vortices
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: October 11, 2007
Revised Manuscript: December 21, 2007
Manuscript Accepted: December 23, 2007
Published: January 11, 2008

Citation
Jörg B. Götte, Kevin O’Holleran, Daryl Preece, Florian Flossmann, Sonja Franke-Arnold, Stephen M. Barnett, and Miles J. Padgett, "Light beams with fractional orbital angular momentum and their vortex structure," Opt. Express 16, 993-1006 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-2-993


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