https://doi.org/10.1140/epjp/s13360-025-06504-9
Regular Article
Propagation of twisted laser carrying orbital angular momentum in relativistic magnetized plasma by using paraxial-like approach
1
Department of Physics, Devchand College, 591237, Arjunnagar, Maharashtra, India
2
Department of Physics, Vivekanand College, 416003, Kolhapur, Maharashtra, India
3
Department of Physics, Shivaji University, 416004, Kolhapur, Maharashtra, India
Received:
27
September
2024
Accepted:
1
June
2025
Published online:
17
June
2025
This paper presents an analysis of self-focusing of laser, corresponding to the propagation of twisted Laguerre-Gaussian beams (LGBs) in plasma along the direction of a static magnetic field. The nonlinearity in the dielectric constant of plasma considered herein is of relativistic type. The nonlinear differential equation for the beam-width parameter is established under the parabolic equation approach for the phenomenon of self-focusing of a laser beam in plasma. The nature of propagation of LGBs for both radial and vortex mode indices is studied by radial expansion of the dielectric function, corresponding to the electric field of the beam around the position of the maximum under paraxial-like approximation. Results are obtained numerically and illustrated graphically for typical values of laser-plasma parameters. The effect of orbital angular momentum (OAM) carried by LGBs on the nature of critical curves is considered. The impact of the strength of the magnetic field on critical curves is also explicitly taken into account for the numerical appreciation of the results. Finally, to highlight the response of the plasma, two distinct propagation modes, such as left circular polarization (LCP) and right circular polarization (RCP), are compared.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
