Nanocontrol of single dense energetic electron sheet in a chirped pulse with critical relativistic intensity

Abstract

We investigate the effect of laser frequency chirp on the generation of a dense energetic electron sheet. The direct acceleration regime of laser driven dense electron sheet requires high laser intensity to function efficiently. We demonstrate this requirement can be relaxed by applying chirped lasers. The acceleration becomes more efficient while driven by a pulse with a proper linear chirp, leading to a dense energetic electron sheet in nanoscale, and therefore requires lower laser intensity.

A Simple Model for the Fields of a Chirped Laser Pulse With Application to Electron Laser Acceleration

“…Chirped laser pulses have been employed in theoretical laser-acceleration investigations for some time now [8][9][10][11], but only a few experiments have shown some evidence of vacuum laser acceleration using few-cycle laser pulses [12,13], let alone chirped few-cycle pulses. In any case, results based on the one-dimensional model, to be introduced in this paper, may be compared to those stemming from the full three-dimensional calculations, only qualitatively.…”