Raman scattering of a laser beam carrying an orbital angular momentum
- 1 June 2022
- journal article
- research article
- Published by AIP Publishing in Physics of Plasmas
- Vol. 29 (6)
- https://doi.org/10.1063/5.0086700
Abstract
We study theoretically and numerically the Raman backscattering process of a laser beam carrying an orbital angular momentum. By expanding the electromagnetic and electrostatic waves over the Laguerre-Gauss modes, we retrieve the strong dependence of the growth rate on the radial overlap of these functions. The presence of an orbital angular momentum in the laser beam results in a mitigation of the Raman backscattering by 30%. This is confirmed with three-dimensional particle-in-cell simulations. Both the theoretical description and numerical analysis show that the scattered electromagnetic wave is generated with an azimuthal order equal to the laser beam's. Published under an exclusive license by AIP Publishing.Keywords
Funding Information
- Grand Équipement National De Calcul Intensif (2020-A0090506129)
- Foundation for the Advancement of Theoretical Physics and Mathematics
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