Nonlinear structure of electromagnetic field, electron temperature and electron density in interaction of relativistic laser and plasma with density ripple

Abstract

In the paper, nonlinear structure of electromagnetic field, electron temperature, and electron density in interaction with relativistic laser and collisional underdense rippled plasma are investigated. The results are shown that due to the combination influence of relativistic effect, ohmic heating and plasma density ripple, electromagnetic field profile presents obvious asynchronism, which the peak of electric field run ahead of the peak of magnetic field. Furthermore, the electromagnetic field profiles show obvious non-sinusoidal, and the profile of electron temperature and density become highly peaked. Especially, compared with the previous work, due to the added influence of plasma density ripple, electromagnetic field, electron temperature and electron density present obvious oscillation along plasma length rather than stabilization amplitude, and their peak are out of sync.

THz radiation by amplitude-modulated self-focused Gaussian laser beam in ripple density plasma

“…The importance of density ripple in the plasma has also been discussed by some authors in context of other phenomena taking place in the laser-plasma interaction (Singh et al, 2010;Xia & Xu, 2013;Xia, 2014). Significant amount of research is going into the fabrication of such kind of structure due to their other applications such as in the development plasma photonic devices.…”

Programmable electron density patterns induced by the interaction of an array laser and underdense plasma

“…A number of nonlinear effects are observed in intense highfrequency electromagnetic waves and plasma interactions. These effects are closely associated with the ponderomotive force of lasers and the surface structure of media [1][2][3][4]. In general, the ponderomotive force is a nonlinear force resulting from the longitudinal and transverse spatial variation of the laser's intensity [5][6][7][8][9][10].…”

Non‐paraxial theory of self‐focusing/defocusing of Hermite cosh Gaussian laser beam in rippled density plasmas

“…They have reported arbitrary plasma fabrication structures with concept of laser matching by using a spatial light modulator. Xia has studied non‐linear structure of electromagnetic field, electron temperature, and electron density in laser and rippled density plasma interaction under the relativistic regime. Plasma density ripples influence the obvious oscillations along plasma length rather than stabilized amplitude.…”