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1. 中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
2. 中国科学院大学 北京,100049
纸质出版日期:2012-10-10,
收稿日期:2012-6-26,
修回日期:2012-7-28,
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金方圆, 鄂书林, 王海峰, 陈波. 短脉冲激光加工双温方程的优化运算[J]. 发光学报, 2012,(10): 1143-1148
JIN Fang-yuan, E Shu-lin, WANG Hai-feng, CHEN Bo. Calculation of An Optimized Two Temperature Model for Ultra-short Laser Ablation[J]. Chinese Journal of Luminescence, 2012,(10): 1143-1148
金方圆, 鄂书林, 王海峰, 陈波. 短脉冲激光加工双温方程的优化运算[J]. 发光学报, 2012,(10): 1143-1148 DOI: 10.3788/fgxb20123310.1143.
JIN Fang-yuan, E Shu-lin, WANG Hai-feng, CHEN Bo. Calculation of An Optimized Two Temperature Model for Ultra-short Laser Ablation[J]. Chinese Journal of Luminescence, 2012,(10): 1143-1148 DOI: 10.3788/fgxb20123310.1143.
为研究双温方程中电子热传导项和电子与晶格耦合项对激光辐照物体表面温度场求解的影响
对这两项施加了约束条件。由于飞秒和亚皮秒激光与物质相互作用时间短
电子与晶格来不及耦合
所以对耦合项施加时间约束;根据相分离条件(CPPS)
对热传导项施加空间约束。利用有限元方法建立了激光烧蚀金属铜膜表面的有限元模型。通过分析双温方程中热传导项和耦合项对计算结果的影响
发现短脉冲激光与铜金属相互作用过程中电子与晶格耦合项可以忽略
而传导项不可忽略。求解适当激光功率下的双温方程
得到了激光作用中心电子与晶格在不同脉冲宽度激光辐照下的温度变化关系。根据100fs激光作用后晶格温度场的空间分布情况
研究了激光作用的相分离区域、相爆炸区域以及熔融区域的分布情况。
Since the pulse duration of femtosecond and sub-picosecond laser are quite short
the electrons and lattice in material cant couple in time when the sample is irradiated by ultra-short pulse laser.According to critical-point phase separation (CPPS) theory and actual laser ablation process
the thermal conductivity in the model can be restricted regionally.Based on aforementioned analysis
an optimized two temperature model (TTM) is formulated
which provides a new perspective into the energy transport process during ultrashort single pulse laser ablation.Using finite element analysis (FEA) software
a model which exhibits the cuprum film sample irradiated by ultrashort pulse laser is proposed.Taking account of symmetrical spatial shape of Gaussian distribution laser on the sample
part of the model is used to calculate simply.According to calculation
the electron-lattice coupling and thermal conduction transient parts in the optimized TTM are analyzed separately.The results indicate that
during ultra-short laser irradiating on cuprum film
the coupling item can be neglected
but the conduction item cant be neglected.The conduction item plays a major role during femtosecond and sub-picosecond laser irradiating on cuprum
while the electron-lattice coupling item plays a major part after laser's effect.With finite element method (FEM)
the optimized 1D and 2D TTM model are calculated.For the purpose of ablating sample
suitable laser pulse fluence of 100 fs
300 fs
1 ps
2 ps are applied.The electron and lattice transient temperature distribution evolutions along time in the centre of laser irradiated zone are obtained.For further analysis
according to the spatial lattice temperature distribution
phase separation zone
phase explosion zone and melting zone are calculated.
短脉冲激光双温方程有限元相分离(CPPS)
ultra-short laser pulsetwo temperature model (TTM)finite element method (FEM)critical-point phase separation(CPPS)
Glezer E N,Milosavljevic M,Huang L,et al. Three-dimensional optical storage in side transparent materials [J]. Opt.Lett.,1996,21(24):2023-2025.
Mendonca C R,Orlando S,Cosendey G.Femtosecond laser micro machining in the conjugated polymer MEH-PPV [J]. Appl.Surf.Sci.,2007,254(4):1135-1139.
Wang L,Xu H Y,Li X H,et al. Optical and electrical properties of p-type ZnO:N films grown by N-plasma assisted pulsed laser deposition [J]. Chin.J.Lumin.(发光学报), 2011,32(10):977-982 (in English).
Tian Z R,Liu Y F,Jin Y,et al. Fabrication of polymer distributed feedback laser by direct interference ablation [J]. Chin.J.Lumin.(发光学报), 2012,33(2):197-200 (in Chinese).
Anisimov S I,Kapeliovich B L,Perelman T L,et al. Electron emission from metal surface exposed to ultra-short laser pulses [J]. Sov.Phys.JETP, 1974,39:375-378.
Itina T E,Hermann J,Delaporte P H,et al. Modeling of metal ablation induced by ultrashort laser pulses [J]. Thin Solid Films,2004,453-454:513-517.
Xu X F,Cheng C R,Chowdhury I H.Molecular dynamics study of phase change mechanisms during femtosecond laser ablation [J]. J.Heat Trans.,2004,126:727-734.
Zhu S J,Wang X L,Zhu W H,et al. Numerical simulation for influence of pulse duration on femtosecond laser ablation of alloy [J]. Laser Technology (激光技术), 2011,26(6):39-44 (in Chinese).
Chichkov B N,Momma C,Nolte S,et al. Femtosecond,picosecond and nanosecond laser ablation of solids [J]. Appl.Phys.,1996,63(2):109-115
Vatsya S R,Virk K S.Solution of two-temperature thermal diffusion model of laser-metal interactions [J]. J.Laser Appl.,2003,15(4):273-278.
Ni X C,Wang Q Y.Finite difference method for thermal analysis of femtosecond-picosecond pulse laser ablation on metal surface [J]. Chin.J.Lasers (中国激光),2004,31(3):277-280 (in Chinese).
Fang R R,Zhang D M,Wei H,et al. Effect of pulse width and fluence of femtosecond laser on electron phonon relaxation time [J]. Chin.Phys.Lett.(中国物理快报), 2008,25(10):3716-3719 (in English).
Lu L Z,Shi Y F,Xu C G,et al. Numerical simulation of influence of pulse width on temperature generated by femtosecond laser [J]. J.Jiangsu University:Natural Science Edition (江苏大学学报,自然科学版),2011,32(2):199-204 (in Chinese).
Shi Y F,Lu L Z,Xu C G,et al. Influence of physical parameters on ultrashort pulse laser excitation temperature field [J]. J.Appl.Opt.(应用光学), 2011,32(4):810-816 (in Chinese).
Vidal F,Johnston T W,Laville S,et al. Critical-point phase separation in laser ablation of conductors [J]. Phys.Rev.Lett., 2001,86(6):2573-2576.
Wu B X,Shin Y C.A simple model for high fluence ultra-short pulsed laser metal ablation [J]. Appl.Surf.Sci.,2007,253(8):4079-4084.
Hu W Q,Shin Y C,King G.Modeling of multi-burst mode pico-second laser ablation for improved material removal rate [J]. Appl.Phys. A,2010,98(2):407-415.
Yang J,Zhao Y,Zhu X.Theoretical studies of ultrafast ablation of metal targets dominated by phase explosion [J]. Appl.Phys.A,2007,89(2):571-578.
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