Perez Danny, Lewis Laurent J
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.
Phys Rev Lett. 2002 Dec 16;89(25):255504. doi: 10.1103/PhysRevLett.89.255504. Epub 2002 Dec 3.
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.
我们使用分子动力学和一个简单的二维 Lennard-Jones 模型研究飞秒激光脉冲导致烧蚀的基本机制。我们证明，烧蚀过程涉及三种不同的机制，这是沉积能量的函数。特别是，它可能源于机械破碎，这并不要求系统跨越任何亚稳或不稳定线。在这种情况下，均匀成核和汽化对烧蚀描述的相关性也已确立。
