Ablation of molecular solids under nanosecond laser pulses: The role of inertial confinement

Perez, Danny; Lewis, Laurent J.; Lorazo, Patrick; Meunier, Michel
October 2006
Applied Physics Letters;10/2/2006, Vol. 89 Issue 14, p141907
Academic Journal
The thermal routes to ablation in molecular solids having a long (micron scale) optical penetration depth are investigated under nanosecond laser pulses using a two-dimensional molecular-dynamics model. The authors demonstrate that the mechanisms of matter removal are mainly determined by the local degree of inertial confinement; by increasing level of confinement, these are (trivial) fragmentation, phase explosion, and heterogeneous nucleation of vapor bubbles at solid-liquid boundaries. The thermodynamic pathways to ablation are shown to be different from those predicted by the model of Miotello and Kelly [Appl. Phys. Lett. 67, 3535 (1995); Appl. Phys. A: Mater. Sci. Process. 69, S67 (1999)].


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