Momentum paradox in a vortex core

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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 1362-3044 (https://doi.org/10.1080/09500340412331326383)

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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.

  • 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:11 Nov 2024 09:44
    URI:https://strathprints.strath.ac.uk/id/eprint/31082
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