Linear surface photoelectric effect of gold in intense laser field as a possible highhyphen;current electron source

摘要

Investigations were conducted on radiationhyphen;induced electron emission processes on a gold target surface with a highhyphen;intensity (2 MW/cm2) KrF laser (lgr;=248 nm). The single photon surface photoelectric emission obtained can be used for highhyphen;current density electron sources. The measured polarization dependence of electron current shows the dominance of the surfacehyphen;type effect over that of the volume type, thereby making it possible to optimize the short, highhyphen;density electron current creation conditions. The advantage of the grazing light incidence and the multiphoton photoeffect giving rise to a 500 A/cm2electron current has been demonstrated.