Momentum paradox in a vortex core

Zambrini, R and Thomson, L C and Barnett, S M and Padgett, M (2005) Momentum paradox in a vortex core. Journal of Modern Optics, 52 (8). pp. 1135-1144. ISSN 0950-0340 (https://doi.org/10.1080/09500340412331326383)

Abstract

The identification of angular momentum l (h) over bar per photon with optical vortices of charge l appears to require that the field amplitude be zero within a finite distance of the vortex. This, however, is not compatible with the known form of beams such as the Laguerre - Gaussian and Bessel beams. We resolve this paradox by analysing the propagation of a Bessel beam through a small circular aperture, showing that the resulting field has evanescent components.

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• Item metadata

  Item type:	Article
  ID code:	31082
  Dates:	Date Event 20 May 2005 Published
  Subjects:	Science > Physics > Optics. Light
  Department:	Faculty of Science > Physics
  Depositing user:	Pure Administrator
  Date deposited:	22 Jun 2011 15:19
  Last modified:	08 Apr 2024 19:05
  URI:	https://strathprints.strath.ac.uk/id/eprint/31082