A model of the plasma resistivity, or equivalently the electron-ion collision frequency ν, which can be used to describe absorption of ultrashort laser pulses in solid density plasmas has been constructed. Using kinetic theory based on a memory function formulation and a projection operator method, we have derived an analytical expression for ν, which is valid in strongly coupled plasmas, properly accounts for the laser frequency dependence, and can be applied to plasmas with different electron and ion temperatures.

• Received 9 March 1995

DOI:https://doi.org/10.1103/PhysRevE.52.2974