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The enigma of optical momentum in a medium

Barnett, Stephen M. and Loudon, Rodney (2010) The enigma of optical momentum in a medium. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 368 (1914). pp. 927-939. ISSN 1364-503X

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    Abstract

    It is 100 years since Minkowski and Abraham first gave rival expressions for the momentum of light in a material medium. At the single-photon level, these correspond, respectively, either to multiplying or dividing the free-space value () by the refractive index (n). The debate that this work started has continued till the present day, punctuated by the occasional publication of 'decisive' experimental demonstrations supporting one or other of these values. We review the compelling arguments made in support of the Minkowski and Abraham forms and are led to the conclusion that both momenta are correct. We explain why two distinct momenta are needed to describe light in a medium and why each appears as the natural, and experimentally observed, momentum in appropriate situations.

    Item type: Article
    ID code: 27285
    Keywords: optics, optical momentum, Physics
    Subjects: Science > Physics
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Leonie Airley
    Date Deposited: 31 Aug 2010 14:04
    Last modified: 27 Mar 2014 11:18
    URI: http://strathprints.strath.ac.uk/id/eprint/27285

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