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A proposed measurement of optical orbital and spin angular momentum and its implications for photon angular momentum

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Title: A proposed measurement of optical orbital and spin angular momentum and its implications for photon angular momentum
Authors: Leader, E
Item Type: Journal Article
Abstract: The expression for the total angular momentum carried by a laser optical vortex beam, splits, in the paraxial approximation, into two terms which seem to represent orbital and spin angular momentum respectively. There are, however, two very different competing versions of the formula for the spin angular momentum, one based on the use of the Poynting vector, as in classical electrodynamics, the other related to the canonical expression for the angular momentum which occurs in Quantum Electrodynamics. I analyze the possibility that a sufficiently sensitive optical measurement could decide which of these corresponds to the actual physical angular momentum carried by the beam.
Issue Date: 21-Feb-2018
Date of Acceptance: 14-Feb-2018
URI: http://hdl.handle.net/10044/1/58741
DOI: https://dx.doi.org/10.1016/j.physletb.2018.02.029
ISSN: 0370-2693
Publisher: Elsevier
Start Page: 385
End Page: 387
Journal / Book Title: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume: 779
Copyright Statement: © 2018 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/ ).
Sponsor/Funder: The Royal Society
Funder's Grant Number: 2005/R3
Keywords: 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status: Published
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences



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