An improved three-dimensional two-temperature model for multi-pulse femtosecond laser ablation of aluminum

2015 ◽  
Vol 117 (6) ◽  
pp. 063104 ◽  
Author(s):  
Jinping Zhang ◽  
Yuping Chen ◽  
Mengning Hu ◽  
Xianfeng Chen
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Three Dimensional ◽  
Femtosecond Laser Ablation ◽  
Temperature Model ◽  
Two Temperature

scholarly journals Improved two-temperature model and its application in femtosecond laser ablation of metal target

2010 ◽  
Vol 28 (1) ◽  
pp. 157-164 ◽  
Author(s):  
Ranran Fang ◽  
Duanming Zhang ◽  
Hua Wei ◽  
Zhihua Li ◽  
Fengxia Yang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Femtosecond Laser Ablation ◽  
Temperature Model ◽  
Metal Target ◽  
Temperature Dependent ◽  
Two Temperature

AbstractAn improved two-temperature model to describe femtosecond laser ablation of metal target was presented. The temperature-dependent heat capacity and thermal conductivity of the electron, as well as electron temperature-dependent absorption coefficient and absorptivity are all considered in this two-temperature model. The tailored two-temperature model is solved using a finite difference method for copper target. The time-dependence of lattice and electron temperature of the surface for different laser fluence are performed, respectively. The temperature distribution of the electron and lattice along with space and time for a certain laser fluence is also presented. Moreover, the variation of ablation rate per pulse with laser fluence is obtained. The satisfactory agreement between our numerical results and experimental data indicates that the temperature dependence of heat capacity, thermal conductivity, absorption coefficient and absorptivity in femtosecond laser ablation of metal target must not be neglected. The present model will be helpful for the further experimental investigation of application of the femtosecond laser.

scholarly journals Femtosecond laser ablation enhances cell infiltration into three-dimensional electrospun scaffolds

2012 ◽  
Vol 8 (7) ◽  
pp. 2648-2658 ◽  
Author(s):  
Benjamin Li-Ping Lee ◽  
Hojeong Jeon ◽  
Aijun Wang ◽  
Zhiqiang Yan ◽  
Jian Yu ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Three Dimensional ◽  
Femtosecond Laser Ablation ◽  
Cell Infiltration ◽  
Electrospun Scaffolds

Fabrication of three-dimensional metal structures embedded in hydrogel by using femtosecond laser ablation and electroplating

2020 ◽  
Vol 45 (22) ◽  
pp. 6286
Author(s):  
Tao Chen ◽  
Pingping Zhao ◽  
Kaidi Li ◽  
Jinhai Si ◽  
Jian Hu ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Three Dimensional ◽  
Femtosecond Laser Ablation ◽  
Metal Structures

Materials Removals During Femtosecond Laser Non-Thermal Ablation of Dielectrics

2006 ◽  
Author(s):  
Lan Jiang ◽  
Hai-Lung Tsai
Keyword(s):  
Experimental Data ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Electron Density ◽  
Free Electron ◽  
Femtosecond Laser Ablation ◽  
Threshold Fluence ◽  
Plasma Model ◽  
Free Electron Density ◽  
Two Temperature

It remains a big challenge to theoretically predict the material removals mechanism in femtosecond laser ablation. To bypass this unresolved problem, many calculations of femtosecond laser ablation of non-metals have been based on free electron density distribution without the actual consideration of the phase change mechanism. However, this widely-used key assumption needs further theoretical and experimental confirmations. By combining the plasma model and improved two-temperature model developed by the authors, this study focuses on investigating ablation threshold fluence, depth, and shape during femtosecond laser ablation of dielectrics through non-thermal processes (the Coulomb explosion and electrostatic ablation). The predicted ablation depths and shapes in fused silica, by using 1) the plasma model only and 2) the plasma model plus the two-temperature equation, are both in agreement with published experimental data. The widely-used assumptions for threshold fluence, ablation depth, and shape in the plasma model based on free electron density are validated by the comparison study and experimental data.

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