Theoretical and ezperimental study of energy transportation and accumulation in femtosecond laser ablation on metals
The energy transportation and accumulation effect for femtosecond (fs) laser ablation on metal targets were studied using both theoretical and experimental methods.Using finite difference method,numerical simulation of energy transportation characteristics on copper target ablated by femtosecond laser was performed.Energy accumulation effects on metals of silver and copper ablated by an amplified Ti: sapphire femtosecond laser system were then studied experimentally.The simulated results show that the electrons and lattices have different temperature evolvement characteristics in the ablation stage.The electron temperature increases sharply and reaches the maximum in several femtoseconds while it needs thousands of femtoseconds for lattice to reach the maximum temperature.The experimental results show that uniform laser-induced periodic surface structures (PSS) can be formed with the appropriate pulsed numbers and laser energy density.Electron-phonon coupling coefficient plays an important role in PSS formation in different metals.Surface ripples of Cu are more pronounced than those of Au under the same laser energy density.
femtosecond laser ablation energy transportation energy accumulation periodic surface structure
TAN Xin-yu ZHANG Duan-ming MAO Feng LI Zhi-hua YI DI ZHANG Xiao-zhong
School of Science,China Three Gorges University,Yichang 443002,China;Key Laboratory of Advanced Mate School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China School of Science,China Three Gorges University,Yichang 443002,China Key Laboratory of Advanced Materials,Department of Materials Science and Engineering,Tsinghua Univer
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
1645-1650
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）