Numerical analysis of laser ablation using the axisymmetric two-temperature model

An overview is given of different modeling work that has been carried out, and is currently going on in our research group, in the field of modeling for laser ablation (LA). Most emphasis will be put on nanosecond (ns) LA, more specifically describing the laser-solid interaction, leading to heating, melting and vaporization of the target, by a heat conduction model, the expansion of the evaporated plume in vacuum or in a background gas by a set of conservation equations, and the plasma formation in the plume, assuming local thermal equilibrium. Some first results for nanoparticle formation in the expanding plume will be presented as well. Also, the process of target heating in the case of femtosecond (fs) LA will be described by means of a two-temperature model, and phase transitions, more specifically evaporation, will be illustrated by means of molecular dynamics simulations.

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Simulation of laser ablation of metals for nanoparticles production

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194516601435 ◽

2016 ◽

Vol 41 ◽

pp. 1660143 ◽

Cited By ~ 1

Author(s):

R. V. Davydov ◽

V. I. Antonov ◽

T. I. Davydova

Keyword(s):

Experimental Data ◽

Laser Ablation ◽

Femtosecond Laser Ablation ◽

Hydrodynamic Equations ◽

Temperature Model ◽

Wide Range ◽

Simulation Results ◽

Range Equation ◽

Two Temperature ◽

Good Agreement

In this paper a mathematical model for femtosecond laser ablation of metals is proposed, based on standard two-temperature model connected with 1D hydrodynamic equations. Wide-range equation of state has been developed. The simulation results are compared with experimental data for aluminium and copper. A good agreement for both metals with numerical results and experiment shows that this model can be employed for choosing laser parameters to better accuracy in nanoparticles production by ablation of metals.

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Erratum to: Femtosecond pulse laser ablation of chromium: experimental results and two-temperature model simulations

Applied Physics A ◽

10.1007/s00339-016-0723-2 ◽

2017 ◽

Vol 123 (2) ◽

Author(s):

M. Saghebfar ◽

M. K. Tehrani ◽

S. M. R. Darbani ◽

A. E. Majd

Keyword(s):

Laser Ablation ◽

Pulse Laser ◽

Femtosecond Pulse ◽

Pulse Laser Ablation ◽

Experimental Results ◽

Temperature Model ◽

Model Simulations ◽

Femtosecond Pulse Laser ◽

Two Temperature

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Short-pulse laser ablation of materials at high intensities: Influence of plasma effects

Laser and Particle Beams ◽

10.1017/s0263034610000078 ◽

2010 ◽

Vol 28 (2) ◽

pp. 235-244 ◽

Cited By ~ 16

Author(s):

Dimitri Batani

Keyword(s):

Laser Ablation ◽

Short Pulse ◽

Temperature Model ◽

Fast Electrons ◽

Short Pulse Laser ◽

Plasma Effects ◽

Background Material ◽

Short Pulse Lasers ◽

Induced Changes ◽

Two Temperature

AbstractThe paper is devoted to the study of plasma effects, which are present in laser ablation at relatively high intensity (I ≥ 1012 W/cm2). We start from the classical “two temperature model” of laser ablation (“cold solid approximation”) and we extend it to higher intensities where laser-induced heating and laser-induced changes in the background material become relevant. The new model is also compared to experimental results on laser ablation of solid targets from short pulse lasers at high intensities (up to 1014 W/cm2). Finally, we consider the effects on laser-ablation of laser-generated fast electrons.

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

Laser and Particle Beams ◽

10.1017/s0263034610000030 ◽

2010 ◽

Vol 28 (1) ◽

pp. 157-164 ◽

Cited By ~ 16

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.

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