A unified thermal model of thermophysical effects with pulse width from nanosecond to femtosecond
A unified thermal model of thermophysical effects with pulse width from nanosecond to femtosecond
复制标题
脉冲宽度从纳秒到飞秒的热物理效应的统一热模型
DOI：
10.1051/epjap:2008061
复制
发表时间：
2008-06-01
影响因子：
1
通讯作者：
Yang, F. X.
中科院分区：
文献类型：
--
作者：
Fang, R. R.;Zhang, D. M.;Yang, F. X.
本文提出了一个统一的热模型，该模型能够描述纳秒到飞秒激光脉冲宽度范围内的热物理效应。以金靶为例，从统一模型出发，采用有限差分法得到了数值解。给出了在一定的激光能量密度下，电子和晶格沿着空间和时间的温度分布。研究了不同激光能量密度下表面晶格温度和电子温度随时间的变化关系。蒸发阈值的计算结果与实验结果吻合较好，表明了统一热模型的正确性和合理性。
This paper presents a unified thermal model, which can describe the thermophysical effects with laser pulse width ranges from nanosecond to femtosecond. Take gold target as an example, the numerical solutions are obtained from the unified model using a finite difference method. The temperature distribution of the electron and the lattice along with space and time at a certain laser fluence is presented. The time-dependence of lattice and electron temperature on the surface for different laser fluence is also performed. The satisfactory agreement between our numerical results and experimental results of vaporization threshold indicates that the unified thermal model is correct and reasonable.