Metal absorptivity in femtosecond pulsed laser ablation

被引：4

作者：

Li L. ^{[1
]}

Zhang D.-M. ^{[1
]}

Li Z.-H. ^{[1
]}

Tan X.-Y. ^{[1
]}

Fang R.-R. ^{[1
]}

机构：

[1] Department of Physics, Huazhong University of Science and Technology

来源：

Frontiers of Physics in China | 2007年 / 2卷 / 3期

基金：

中国国家自然科学基金;

关键词：

Absorptivity; Femtosecond pulsed laser ablation; Target temperature; Two-temperature model;

D O I：

10.1007/s11467-007-0048-x

中图分类号：

学科分类号：

摘要：

In this paper, the effect of the absorptivity of metal on femtosecond pulsed laser ablation is investigated. The formulas for the absorptivity depending on target temperature are derived from Maxwell Equations and the Lambert-Beer's law. Based on this, a new two-temperature model is proposed to describe the femtosecond pulsed laser ablation with metal. Then, using Au as an example, a finite difference method is employed to simulate the space-dependent and time-dependent absorptivity and the target temperature. The temperature evolution of our model is compared with the result obtained form the heat conduction model taking the absorptivity as constant. It is shown that the absorptivity plays an important role in the femtosecond pulsed laser ablation. The results of this paper are helpful in choosing the best technical parameters in femtosecond pulsed laser ablation. © 2007 Higher Education Press and Springer-Verlag.

引用

页码：322 / 326

页数：4

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