The Influence of DOS Effects on Ablation Properties in High Energy Femtosecond Laser Ablation Process

摘要：

The numerical simulation of high-energy femtosecond laser ablation on metal target is studied in this paper. Based on the two-temperature model (TTM), a new model considering the effects of the electron density of states (DOS) on electronic heat capacity, electron-phonon coupling coefficient and electronic thermal conductivity is established. As an example of gold target, the relationship between the melting threshold and the thickness of gold films is numerically calculated. Our result is more consistent with the experimental datum in contrast to the results without considering the DOS effects. This shows that the revised TTM of high-energy femtosecond laser ablation (i.e. DOS-TTM) is more reasonable compared with general used TTM.

关键词： DOS effects Electronic density of states Femtosecond laser ablation Electron thermal conductivity

作者: Huili WEI Feng MAO Xinyu TAN Xiangping HUANG Zhao WANG Huijin XU Changyuan ZHANG Jia YI

作者单位: Department of Physics, China Three Gorges University, Yichang 443002, China Department of Physics, China Three Gorges University, Yichang 443002, China Laboratory of Advanced M

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 11-15

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）