Short-pulse ablation rates and the two-temperature model

A numerical simulation of the two-temperature model has been performed for Au, Ag, Cu and Al. Based on findings in the numerical simulation, an analytical model for the ablation rates in the high fluence regime is proposed. Furthermore, it is shown that a temperature-dependent electron-lattice coupling must be introduced to have qualitative agreement with the logarithmic growth in the low fluence regime. For aluminum, experimental ablation rates with varying fluence is presented and compared with the numerical simulation. (C) 2007 Elsevier B.V. All rights reserved.