Theoretical and experimental study of energy transportation and accumulation in femtosecond laser ablation on metals
| Autor: | Xin-yu Tan, Xiao-zhong Zhang, Duan-ming Zhang, Feng Mao, Zhi-hua Li, Di Yi |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Laser ablation business.industry Metals and Alloys Physics::Optics chemistry.chemical_element Electron Geotechnical Engineering and Engineering Geology Condensed Matter Physics Laser Copper Molecular physics eye diseases law.invention Optics chemistry law Femtosecond Physics::Atomic and Molecular Clusters Materials Chemistry Sapphire Electron temperature business Coupling coefficient of resonators |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 19:1645-1650 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(09)60083-2 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect