Photon orbital angular momentum in a plasma vortex

Details Photon orbital angular momentum in a plasma vortex Photon orbital angular momentum in a plasma vortex

2008-04-20

arxiv.org/abs/0804.3221v3

Physics

Plasma Physics

4 pages, submitted to Phys. Rev. Lett

Scientific paper

We study theoretically the exchange of angular momentum between a photon beam and a plasma vortex, and demonstrate the possible excitation of photon angular momentum states in a plasma. This can be relevant to laboratory and space plasma diagnostics; radio astronomy self-calibration; and generating photon angular momentum beams. A static plasma perturbation with helical structure, and a rotating plasma vortex are studied in detail and a comparison between these two cases, and their relevance to the physical nature of photon OAM, is established.

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