摘要
在材料(硅和铜) 的两倍脉搏脱离的学习，到在低 fluences 的单个脉搏荧光信号改进的两倍脉搏的下拉被观察。下拉与一个简单的理论一个维的热散开模型一起被分析并且到常数作为 fluence 的功能改变的荧光时间验证了。下拉在液体和稳固的边界由于液体固体混合层被解释。层的效果在低 fluences 变得重要。
In the study of double pulse ablation of materials （silicon and copper）, a dropdown of double pulse to single pulse fluorescence signal enhancement at low fluences is observed. The dropdown is analysed with a simple theoretical one-dimensional heat diffusion model and verified by fluorescence time constants change as a function of fluence. The dropdown is explained as a result of liquid-solid mixture layer at the liquid and solid boundary. The effect of the layer becomes important at low fluences.
基金
Supported by the National Natural Science Foundation of China under Grant No 10404008, the National Science Foundation from United States under Grants Nos PHY-0200812, CHE-0120997 and CHE-0640306, and the Motorola Physical Realization Research Center in Schaumburg, IL.
关键词
荧光性
脉冲激光消融技术
热扩散
能流
the power-law exponents, precipitation, durative, abrupt precipitation change
