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Sci Rep. 2017 Feb 6;7:41731. doi: 10.1038/srep41731.

Photons, phonons, and plasmons with orbital angular momentum in plasmas.

Chen Q1,2, Qin H1,3, Liu J1.

Author information

1
School of Nuclear Science and Technology and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
2
Luoyang Electronic Equipment Testing Center, Luoyang 471000, China.
3
Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543, USA.

Abstract

Exact eigen modes with orbital angular momentum (OAM) in the complex media of unmagnetized homogeneous plasmas are studied. Three exact eigen modes with OAM are derived, i.e., photons, phonons, and plasmons. The OAM of different plasma components are closely related to the charge polarities. For photons, the OAM of electrons and ions are of the same magnitude but opposite direction, and the total OAM is carried by the field. For the phonons and plasmons, their OAM are carried by the electrons and ions. The OAM modes in plasmas and their characteristics can be explored for potential applications in plasma physics and accelerator physics.

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