Numerical investigation for shape controlling of ultrathin electron layer

Abstract

To control the shape of the ultra-thin electron layer produced by directly interaction of ultrahigh contrast laser with ultrathin foil target, we investigated the spacial distribution and temporal evolution of electron layers produced from single and double foil targets through two-dimensional particle-in-cell simulations. Results show that electron layers produced from double foil targets can fly with unperturbed velocity for a much longer time than in the single foil case, which can be explained by the integrated contribution of charge separation field from both the two foils. Further studies show that through adjusting the foil expansion, electron layers with different shapes can be obtained. Detailed studies on the forming process of layers show that electron momentum distribution evolves rapidly along with the pump laser and then the vanishing of electron transverse momentum induced by the reflected laser results in the forming of layer shape. So different foil expansion corresponds to different moments that reflected laser interact with electron layer, when the electron transverse momentum distribution is different. After the reflected laser interact with electron layer, the resultant longitude momentum distribution will finally lead to various electron layer shapes.

Selective amplification of the chirped attosecond pulses produced from relativistic electron mirrors

“…The numerical studies on the interaction between ultra-high contrast laser and solid nanofilm targets show the possibility to directly push a whole electron layer from the targets (Kulagin et al, 2007). The REM radiation studies have attracted many theoretical (Habs et al, 2008;Esirkepov et al, 2009;Meyer-ter-Vehn and Wu, 2009;Wen et al, 2009Wen et al, , 2012Wu and Meyer-ter-Vehn, 2009;Wu et al, 2010Wu et al, , 2011Wu, 2011;Tan et al, 2012) and experimental efforts (Kiefer et al, 2009(Kiefer et al, , 2013. In recently review papers (Bulanov et al, 2013(Bulanov et al, , 2016, the mechanism of generating the REM and frequency upshifted radiation pulse have been presented.…”

Selective amplification of the chirped attosecond pulses produced from relativistic electron mirrors

“…The numerical studies on the interaction between ultra-high-contrast laser and solid nanofilm targets show the possibility to directly push a whole electron layer from the targets (Kulagin et al, 2007). The REM radiation studies have attracted many theoretical (Habs et al, 2008;Esirkepov et al, 2009;Meyer-ter-Vehn and Wu, 2009;Wen et al, 2009;Wu and Meyer-ter-Vehn, 2009;Wu et al, 2010Wu et al, , 2011Wu, 2011;Tan et al, 2012;Wen et al, 2012) and experimental efforts (Kiefer et al, 2009(Kiefer et al, , 2013. In recent review papers (Bulanov et al, 2013(Bulanov et al, , 2016, the mechanism of generating the REM and frequency upshifted radiation pulse has been presented.…”