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
    Dates:
    Date
    Event
    21 January 2008
    Published
    Keywords:light beams, fractional orbital angular momentum, vortex structure, Physics, Atomic and Molecular Physics, and Optics
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Strathprints Administrator
    Date deposited:01 Jun 2010 11:33
    Last modified:30 Apr 2021 03:02
    URI:https://strathprints.strath.ac.uk/id/eprint/19830
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