| Autor: |
Gupta, Naveen, Johari, Rohit, Alex, A. K., Choudhry, Suman |
| Zdroj: |
Journal of Optics; 20240101, Issue: Preprints p1-18, 18p |
| Abstrakt: |
This paper presents a theoretical investigation on excitation of an electron plasma wave by beating two q-Gaussian laser beams in thermal quantum plasmas. Moment theory in W.K.B. approximation has been invoked to find numerical solution of nonlinear Schrodinger equation for Drude model of dielectric function of plasma. Optical nonlinearity of plasma has been modeled by relativistic mass nonlinearity of plasma electrons. The laser-induced nonlinearity in the dielectric properties of plasma depends not only on the intensity of the first beam but also on that of second beam. Therefore, propagation characteristics of one laser beam affects that of second beam, and hence, cross-focusing of the two laser beams takes place. Due to nonuniform intensity distribution along the wavefronts of the laser beams, the background electron concentration gets modified. The amplitude of EPW, that depends on the background electron concentration, thus gets nonlinearly coupled with the laser beams. Numerical simulations have been carried out to investigate the effects of laser-plasma parameters on cross-focusing of the laser beams and further its effect on power of EPW. |
| Databáze: |
Supplemental Index |
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