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Fourier relationship between angular position and optical orbital angular momentum

Yao, Eric and Franke-Arnold, Sonja and Courtial, Johannes and Barnett, Stephen M. and Padgett, Miles (2006) Fourier relationship between angular position and optical orbital angular momentum. Optics Express, 14 (20). pp. 9071-9076. ISSN 1094-4087

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    Abstract

    We demonstrate the Fourier relationship between angular position and angular momentum for a light mode. In particular we measure the distribution of orbital angular momentum states of light that has passed through an aperture and verify that the orbital angular momentum distribution is given by the complex Fourier-transform of the aperture function. We use spatial light modulators, configured as diffractive optical components, to define the initial orbital angular momentum state of the beam, set the defining aperture, and measure the angular momentum spread of the resulting beam. These measurements clearly confirm the Fourier relationship between angular momentum and angular position, even at light intensities corresponding to the single photon level.

    Item type: Article
    ID code: 6170
    Keywords: physics, optics, fourier relationship, light, photons, angular momentum, beam, aperture, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Darcy Spiller
    Date Deposited: 21 May 2008
    Last modified: 04 Sep 2014 23:23
    URI: http://strathprints.strath.ac.uk/id/eprint/6170

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