laser; metallic target; electrons; when the laser; emission; heating and emission
A high power laser incident on a metallic target heats the electrons in the skin layer within a few ps. For a specific
dependence of electron–phonon collision frequency on electron temperature, vxte1/2 the steady state electron temperature profile turns out to be an exponential function of depth. The heated electrons raise the rate of thermionic emission. When the laser is significantly converted into a surface plasma wave the rate of heating and emission is considerably enhanced.