Hydrodynamic Simulation of the Femtosecond Laser Processing of Metals

摘要：

　　The electron–ion collision frequency is a key factor for simulations of the interaction process of ultrashort lasers with metals.In this paper,we propose a semiempirical method based on the Drude–Sommerfeld model for obtaining the electron–ion collision frequency over a wide temperature range,from solid-state to high-temperature plasma.Moreover,we performed a series of hydrodynamic simulations including the modified electron–ion collision frequency.The results indicated that the modified electron–ion collision frequency can exactly describe not only the energy deposits of various femtosecond laser pulses but also the transient properties of electrons on the metal surface.Moreover,a simple function was identified to describe the relationship between laser intensity and peak electron temperature on the surface.This mothed is expected to be beneficial for simulations of the interaction process of femtosecond laser pulses with metals.

作者: Gao-shi SU Feng WANG Lan JIANG

作者单位: School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China School of Physics,Beijing Institute of Technology,Beijing 100081,China Laser Micro/Nano Fabrication Laboratory,School of Mechanical Engineering,Beijing Institute of Techno

会议类型: 国际会议

会议名称: The 2017 2nd International Seminar on Applied Physics, Optoelectronics and Photonics (APOP 2017) (2017年第二届应用物理、光电子学和光子学国际研讨会)

会议地点: 上海

会议语种:英文

页码: 230-241

在线出版日期: 2017-12-30（万方平台首次上网日期，不代表论文的发表时间）