Ablation of solids under femtosecond laser pulses.
We study the basic mechanisms leading to ablation by femtosecond laser pulses using molecular dynamics and a simple two-dimensional Lennard-Jones model. We demonstrate that the ablation process involves three different mechanisms as a function of deposited energy. In particular, it can result from mechanical fragmentation, which does not require the system to cross any metastability or instability line. The relevance of homogeneous nucleation and vaporization for the description of ablation in this regime is also established.
Perez
Danny
D
Département de physique et Groupe de recherche en physique et technologie de couches minces (GCM), Université de Montréal, C.P. 6128 Succursale Centre-Ville, Québec, Canada H3C 3J7. danny.perez@umontreal.ca
Lewis
Laurent J
LJ