Vlasov simulation of self induced transparency in Laser-Plasma Interaction

This paper reports the use of a 2DIP electromagnetic and relativistic Vlasov code to study the laser-plasma interaction. A method of characteristic is used that solves the Vlasov equation by means of following fixed collisionless phase point trajectories in phase space. A new second order interpolation scheme that is independent of the exact location of neighboring phase points is introduced. The accuracy and small amount of calculations regarding to this scheme makes it a strong one for interpolation when there is a large number of phase points. In this frame of work, transparency of an overdense plasma slab against high intensity laser pulses of linear polarization has been studied. It is shown that by increasing pulse intensity, nonlinear effects cause self induced transparency. Influence of other parameters like duration of the pulse, electron density, thickness of plasma slab and plasma temperature on the transparency of an overdense plasma are also considered.