Light beams with fractional orbital angular momentum and their vortex structure

J.B. Gotte, K. O'Holleran, D. Preece, F. Flossmann, S. Franke-Arnold, S.M. Barnett, M.J. Padgett

Research output: Contribution to journalArticle

118 Citations (Scopus)

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.
LanguageEnglish
Pages993-1006
Number of pages13
JournalOptics Express
Volume16
Issue number2
DOIs
Publication statusPublished - 21 Jan 2008

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light beams
angular momentum
vortices
orbitals
structural stability
emerging
propagation
synthesis

Keywords

  • light beams
  • fractional orbital angular momentum
  • vortex structure

Cite this

Gotte, J. B., O'Holleran, K., Preece, D., Flossmann, F., Franke-Arnold, S., Barnett, S. M., & Padgett, M. J. (2008). Light beams with fractional orbital angular momentum and their vortex structure. Optics Express, 16(2), 993-1006. https://doi.org/10.1364/OE.16.000993
Gotte, J.B. ; O'Holleran, K. ; Preece, D. ; Flossmann, F. ; Franke-Arnold, S. ; Barnett, S.M. ; Padgett, M.J. / Light beams with fractional orbital angular momentum and their vortex structure. In: Optics Express. 2008 ; Vol. 16, No. 2. pp. 993-1006.
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Gotte, JB, O'Holleran, K, Preece, D, Flossmann, F, Franke-Arnold, S, Barnett, SM & Padgett, MJ 2008, 'Light beams with fractional orbital angular momentum and their vortex structure' Optics Express, vol. 16, no. 2, pp. 993-1006. https://doi.org/10.1364/OE.16.000993

Light beams with fractional orbital angular momentum and their vortex structure. / Gotte, J.B.; O'Holleran, K.; Preece, D.; Flossmann, F.; Franke-Arnold, S.; Barnett, S.M.; Padgett, M.J.

In: Optics Express, Vol. 16, No. 2, 21.01.2008, p. 993-1006.

Research output: Contribution to journalArticle

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Gotte JB, O'Holleran K, Preece D, Flossmann F, Franke-Arnold S, Barnett SM et al. Light beams with fractional orbital angular momentum and their vortex structure. Optics Express. 2008 Jan 21;16(2):993-1006. https://doi.org/10.1364/OE.16.000993