Improved thermal model and its application in UV high-power pulsed laser ablation of metal target

被引：33

作者：

Fang, Ranran ^{[1
]}

Zhang, Duanming ^{[1
]}

Li, Zhihua ^{[1
]}

Yang, Fengxia ^{[1
]}

Li, Li ^{[1
]}

Tan, Xinyu ^{[1
]}

Sun, Min ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2008年 / 145卷 / 11-12期

基金：

中国国家自然科学基金;

关键词：

metals; laser processing; heat conduction; thermodynamic properties;

D O I：

10.1016/j.ssc.2008.01.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

An improved thermal model describing UV high-power nanosecond laser ablation of metal target is presented. The vaporization effect, the plasma shielding effect, as well as the absorption coefficient and absorptivity dependence of temperature are considered in this model. Take iron target as an example, the numerical solutions are obtained from the heat flow equations (before and after melting) using a finite difference method. The space and time dependence of temperature of the target, the time dependence of temperature at two different positions for a certain laser fluence, and the ablation rate as a function of laser fluence are also presented. The numerical results that agreed well with the experimental data are much better than the one without, which indicates that the above two effects and the temperature dependence of absorption coefficient and absorptivity in UV high-power laser ablation of metal target should not be neglected. We hope the present model will be useful for further experimental investigation of metal thin films prepared by pulsed laser deposition. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：556 / 560

页数：5

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