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Plasmons with orbital angular momentum
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
2009 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 16, no 11, 112103- p.Article in journal (Refereed) Published
Abstract [en]

Electron plasma waves carrying orbital angular momentum are investigated in an unmagnetized collisionless plasma composed of inertial electrons and static ions. For this purpose, the usual plasmon dispersion relation is employed to derive an approximate paraxial equation. The latter is analyzed with a Gaussian beam solution. For a finite angular momentum associated with the plasmon, Laguerre-Gaussian (LG) solutions are employed for solving the electrostatic potential problem which gives approximate solution and is valid for plasmon beams in the paraxial approximation. The LG potential determines the electric field components and energy flux of plasmons with finite angular momentum. Numerical illustrations show that the radial and angular mode numbers strongly modify the profiles of the LG potential.

Place, publisher, year, edition, pages
2009. Vol. 16, no 11, 112103- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-148209DOI: 10.1063/1.3261802ISI: 000272932100007OAI: oai:DiVA.org:uu-148209DiVA: diva2:401648
Available from: 2011-03-03 Created: 2011-03-03 Last updated: 2011-03-03Bibliographically approved

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