Ablation and spallation of gold films irradiated by ultrashort laser pulses

被引：124

作者：

Demaske, Brian J. ^{[1
]}

Zhakhovsky, Vasily V. ^{[1
]}

Inogamov, Nail A. ^{[2
]}

Oleynik, Ivan I. ^{[1
]}

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[2] RAS, LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 06期

基金：

美国国家科学基金会;

关键词：

METALS;

D O I：

10.1103/PhysRevB.82.064113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By extending molecular-dynamics simulation to the experimental micrometer length scale, we observed the complete dynamics of gold films subjected to ultrashort (less than or similar to 1 ps) laser irradiation, culminating in cavitation then ablation of the melt at the front, and crack nucleation then spallation at the rear side of the sample. For thick films (>0.5 mu m) ablation and spallation are spatially separated; whereas for thin films, they merge into a unique damage process, which leads to a dependence of ablation threshold on film thickness. This work provides insights into thermomechanical dynamics of irradiated metal films, including coupling-decoupling of ablation and spallation processes, and opens up a field of direct comparison between experiment and atomistic simulations.

引用

页数：5

共 24 条

[1] Selected problems of laser ablation theory [J].