激光与光电子学进展, 2012, 49 (8): 083201, 网络出版: 2012-07-30   

多脉冲飞秒激光烧蚀金属箔的热电子发射数值分析 下载: 552次

Numerical Simulation of Thermal Electron Emission in Metal Films Ablated by Multi-Pulse Femtosecond Laser
作者单位
1 深圳大学机电与控制工程学院, 深圳市模具先进制造技术重点实验室, 广东 深圳 518060
2 深圳大学电子科学与技术学院, 深圳市激光工程重点实验室, 广东 深圳 518060
摘要
通过双温模型(TTM)结合Richardson-Dushman方程对多脉冲飞秒激光烧蚀铜箔的热电子发射以及温度场进行了数值模拟。在模拟的过程中充分考虑了随着飞秒激光脉冲个数的改变,铜箔对飞秒激光的反射率、表面吸收率和表面吸收系数的变化等因素,部分改写了飞秒激光光源项,从而实现了多脉冲飞秒激光烧蚀铜箔的热电子发射和温度场的动态数值模拟。数值模拟发现,随着脉冲个数的增加和脉冲间隔的减小,铜箔表面的反射率和表面吸收系数将明显减小,表面吸收率将明显增大,这一变化对铜箔的电子发射以及多脉冲飞秒激光照射下铜箔的温度场具有重要影响;而随着距铜箔表面深度的增加,这些影响将逐渐减小。
Abstract
The characteristics of thermal electron emission of the metal films ablated by multi-pulse femtosecond laser are investigated using the two-temperature model (TTM) coupled with the Richardson-Dushman equation. In the numerical simulation, the variations of reflectivity and absorption of metal films with the change of the number of femtosecond laser pulses and pulse spacing are considered and the dynamic numerical simulation is achieved. It is found that, with the change of femtosecond laser pulse number and pulse spacing, the reflectivity and absorption coefficient of metal films would be raised and the absorptivity would be decreased. And the change of the parameters would have a significant influence on the thermal electron emission and the temperature field of metal films. Meanwhile, with the depth raising, the influence would be diminished.
参考文献

[1] S. I. Anisimov, B. L. Kapeliovich, T. L. Perelman et al.. Electron emission from metal surfaces exposed to ultra short laser pulses[J]. Sov. Phys. JETP, 1974, 39: 375~378

[2] T. Q. Qiu, C. L. Tien. Heat transfer mechanisms during short-pulse laser heating of metals[J]. J. Heat Transfer, 1993, 115(4): 835~841

[3] 倪晓昌, 王清月. 飞秒、皮秒激光烧蚀金属表面的有限差分热分析[J]. 中国激光, 2004, 31(3): 277~280

    Ni Xiaochang, Wang Qingyue. Finite difference method for thermal analysis of femtosecond-picosecond pulse laser ablation on metal surface[J]. Chinese J. Lasers, 2004, 31(3): 277~280

[4] 王德飞, 于继平, 郭春凤 等. 超短脉冲激光烧蚀金属薄膜材料的热效应分析[J]. 中国激光, 2008, 35(10): 1579~1584

    Wang Defei, Yu Jiping, Guo Chunfeng et al.. Thermal effect analysis of metal film ablation by ultra-short laser pulses[J]. Chinese J. Lasers, 2008, 35(10): 1579~1584

[5] 任乃飞, 许美玲, 顾佳方 等. 飞秒激光作用下铁磁薄膜的热化动力学分析[J]. 中国激光, 2010, 37(8): 2057~2062

    Ren Naifei, Xu Meiling, Gu Jiafang et al.. Analysis of thermalization dynamics on ferromagnetic thin film excited by femtosecond laser[J]. Chinese J. Lasers, 2010, 37(8): 2057~2062

[6] X. Y. Wang, D. M. Riffe, Y. S. Lee et al.. Time-resolved electron-temperature measurement in a highly excited gold target using femtosecond thermionic emission[J]. Phys. Rev. B, 1994, 50(11): 8016~8019

[7] T. Balasubramani, S. H. Jeong. Simulation of the thermionic emission during ultrashort pulse laser ablation of metals[J]. J. Phys. Conf. Ser., 2007, 59(1): 595~599

[8] 陈安民, 高勋, 姜远飞 等. 数值模拟飞秒激光加热金属的热电子发射[J]. 物理学报, 2010, 59(10): 7198~7201

    Chen Anmin, Gao Xun, Jiang Yuanfei et al.. Numerical simulation of femtosecond laser heating of metal films using electron thermal emission[J]. Acta Physica Sinica, 2010, 59(10): 7198~7201

[9] A. Gloskovskii, D. A. Valdaitsev, M. Cinchetti et al.. Electron emission from films of Ag and Au nanoparticles excited by a femtosecond pump-probe laser[J]. Phys. Rev. B, 2008, 77(19): 195427

[10] D. M. Riffe, X. Y. Wan, M. C. Downer et al.. Femtosecond thermionic emission from metals in the space-charge-limited regime[J]. J. Opt. Soc. Am. B, 1993, 10(8): 1424~1435

[11] A. Y. Vorobyev, Chunlei Guo. Reflection of femtosecond laser light in multipulse ablation of metals[J]. J. Appl. Phys., 2011, 110(4): 043102

[12] A. Y. Vorobyev, Chunlei Guo. Enhanced absorptance of gold following multipulse femtosecond laser ablation[J]. Phys. Rev. B, 2005, 72(19): 195422

[13] Yuichiro Yamashita, Takehiko Yokomine, Shinji Ebara et al.. Heat transport analysis for femtosecond laser ablation with molecular dynamics: two temperature model method[J]. Fusion Engineering and Design, 2006, 81(8-14): 1695~1700

[14] Lan Jiang, Hai-Lung Tsai. Improved two-temperature model and its application in ultrashort laser heating of metal films[J]. J. Heat Transfer, 2005, 127(10): 1167~1173

[15] N. N. Nedialkov, P. A. Atanasov, S. Amoruso et al.. Laser ablation of metals by femtosecond pulses: theoretical and experimental study[J]. Appl. Surf. Sci., 2007, 253(19): 7761~7766

[16] J. K. Chen, J. E. Beraun. Modelling of ultrashort laser ablation of gold films in vacuum[J]. J. Opt. A, 2003, 5(3): 168~173

[17] Li Li, Duanming Zhang, Zhihua Li et al.. The investigation of optical characteristics of metal target in high power laser ablation[J]. Physica B, 2006, 383(2): 194~201

[18] 李莉, 张端明, 房然然 等. 飞秒多脉冲激光烧蚀金属过程中的能量剩余现象[J]. 强激光与粒子束, 2009, 21(11): 1671~1676

    Li Li, Zhang Duanming, Fang Ranran et al.. Residual energy in femtosecond multipulse laser ablation of metal[J]. High Power Laser and Particle Beams, 2009, 21(11): 1671~1676

[19] 郑启光, 辜建辉. 激光与物质相互作用[M]. 武汉: 华中理工大学出版社, 1996. 22~24

    Zheng Qiguang, Gu Jianhui. Interaction between Laser and Materials[M]. Wuhan: Huazhong University of Science and Technology Press, 1996. 22~24

徐斌, 伍晓宇, 凌世全, 罗烽, 杜晨林, 孙秀泉. 多脉冲飞秒激光烧蚀金属箔的热电子发射数值分析[J]. 激光与光电子学进展, 2012, 49(8): 083201. Xu Bin, Wu Xiaoyu, Ling Shiquan, Luo Feng, Du Chenlin, Sun Xiuquan. Numerical Simulation of Thermal Electron Emission in Metal Films Ablated by Multi-Pulse Femtosecond Laser[J]. Laser & Optoelectronics Progress, 2012, 49(8): 083201.

本文已被 6 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!