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Light beams with fractional orbital angular momentum and their vortex structure

Gotte, J.B. and O'Holleran, K. and Preece, D. and Flossmann, F. and Franke-Arnold, S. and Barnett, S.M. and Padgett, M.J. (2008) Light beams with fractional orbital angular momentum and their vortex structure. Optics Express, 16 (2). pp. 993-1006. ISSN 1094-4087

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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.

Item type: Article
ID code: 19830
Keywords: light beams, fractional orbital angular momentum, vortex structure, Physics, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 01 Jun 2010 12:33
    Last modified: 05 Sep 2014 02:06
    URI: http://strathprints.strath.ac.uk/id/eprint/19830

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