ULTRASHORT-LASER-PULSE ABSORPTION WITH SPATIAL DISPERSION AND NONLOCAL TRANSPORT EFFECTS

We study ultrashort-laser-pulse absorption and plasma heating at a sharp plasma-vacuum interface using advanced models for all-range plasma permittivity and nonlocal heat transport. The electron response includes both collisional and collisionless dissipative effects in the plasma of an arbitrary ion charge. We show that nonlocal electron heat transport is important for correct determination of the value of electron temperature and spatial temperature profile. Nonlocal electron heat flux comes into play after electrons heat up to temperatures of the order of 1 keV and to temperatures several times less for low-density targets.