Volume 90, Number 4, May 2010
|Number of page(s)||4|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||04 June 2010|
Photon orbital angular momentum and mass in a plasma vortex
Department of Astronomy, University of Padova - vicolo dell' Osservatorio 3, I-33122 Padova, Italy, EU
2 Swedish Institute of Space Physics, Physics in Space, Ångström Laboratory - P. O. Box 537, SE-751 21, Uppsala, Sweden, EU
3 IPFN and CFIF, Instituto Superior Técnico - Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, EU
Corresponding author: email@example.com
We analyse the Anderson-Higgs mechanism of photon mass acquisition in a plasma and study the contribution to the mass from the orbital angular momentum acquired by a beam of photons when it crosses a spatially structured charge distribution. To this end we apply Proca-Maxwell equations in a static plasma with a particular spatial distribution of free charges, notably a plasma vortex, that is able to impose orbital angular momentum (OAM) onto light. In addition to the mass acquisition of the conventional Anderson-Higgs mechanism, we find that the photon acquires an additional mass from the OAM and that this mass reduces the Proca photon mass.
PACS: 52.35.We – Plasma vorticity / 14.70.Bh – Photons / 03.50.De – Classical electromagnetism, Maxwell equations
© EPLA, 2010
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