Simulation of ultra-intense laser irradiation induced high electronic excitation of bandgap materials

Using a quantum kinetic approach we describe high electronic excitation of fused silica induced by short pulse, intense laser irradiation. We concentrate on the effect of the impact ionization process on the electron density and average kinetic energy of the electron system. In addition the effect of electron-phonon coupling in the material and the subsequent change in lattice temperature are described. It is evident that even at short pulse duration the role of these processes is significant. (author)