Polarization effect on the relativistic nonlinear dynamics of an intense laser beam propagating in a hot magnetoactive plasma

摘要

Nonlinear dynamics of an intense circularly polarized laser beam interacting with a hot magnetized plasmanis investigated. Using a relativistic fluid model, a modified nonlinear Schr¨odinger equation is derived based onna quasineutral approximation, which is valid for hot plasma. Using a three-dimensional model, spatial-temporalndevelopment of the laser pulse is investigated. The occurrence of some nonlinear phenomena such as self-focusing,nself-modulation, light trapping, and filamentation of the laser pulse is discussed. Also the effect of polarizationnand external magnetic field on the nonlinear evolution of these phenomena is studied.