Comparison of nano- and femtosecond laser ablation of aluminum

Mazhukin, V. I.; Lobok, M. G.

doi:10.1134/s1054660x0905048x

Cited by 18 publications

(12 citation statements)

References 24 publications

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“…Despite extensive studies of fundamental properties of laser ablation performed earlier, a number of important physical phenomena still remain insufficiently well studied and understood. Previous studies have established that the nature of interaction of laser radiation depends both on the modes of action: wavelength [16,17], duration [18,19], and laser pulse intensity [20,21] and on thermophysical and optical properties of the target [22,23], presence of the surrounding gas [24] and its pressure [25,26]. The greatest differences in the physical mechanisms of laser ablation of metals are observed between short (ns) and ultrashort (ps, fs) pulsed modes [18,19].…”

Section: Introductionmentioning

confidence: 96%

“…Continuous models based on the equations of continuous medium mechanics are realized, as a rule, in the form of hydrodynamic models [18,24,28,30,31,[38][39][40][41][42] and use the minimum of information and operate with average values of physical characteristics calculated on infinitesimal volume. The methods for solving them are more compact, they have higher accuracy and a relatively small amount of computation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Mazhukin¹

2017

Laser Ablation - From Fundamentals to Applications

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The basic mathematical models, computational algorithms, and results of mathematical modeling of various modes of laser action on metals are considered. It is shown that for mathematical description and analysis of the processes of laser heating, melting, and evaporation of condensed media, various theoretical approaches are used: continuum, kinetic, atomistic, etc. Each of them has its own field of applicability, its advantages, and disadvantages. Mathematical description of ns-laser ablation is usually carried out within the framework of continuum approach in the form of hydrodynamic models that take into account reaction of irradiated material to varying density, pressure, and energy both in the target and in the vapor-gas medium. Within the framework of continuum approach, a multiphase, multifront hydrodynamic model and computational algorithm were constructed that were designed for modeling ns-PLA of metal targets embedded in gaseous media. It is shown that proposed model and computational algorithm allow to carry out the simulation of interrelated mechanisms of heterogeneous and homogeneous evaporation of metals manifested as a series of explosive boiling. Modeling has shown that explosive boiling in metals occurs due to the presence of a near-surface temperature maximum. It has been established that in ns-PLA, exposure regimes can be realized in which a phase explosion is the main mechanism of material removal. The verification of reliability of obtained results was carried out by comparing experimental data and calculations with atomistic models.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Mazhukin¹

2017

Laser Ablation - From Fundamentals to Applications

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“…According to some authors [7] for nanosecond laser pulses with fluence J less than 30 J/cm 2 , there is no plasma formation in the evaporated material how ever for the same fluence for femtosecond laser pulse plasma is formed after the pulse and has thermal nature.…”

Section: Femtosecond Laser Ablation On Dental Hard Tissues 969mentioning

confidence: 99%

“…Several studies using laser and LEDs have been developed for their application as in medicine to pho todynamic therapy and diagnostics; in dentistry to treatment of pain, hypersensitivity, caries prevention [1][2][3], diagnostics [4], ablation [5][6][7], light curing (or photo activation) of materials [8][9][10][11][12][13], and tooth whitening [14].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

et al. 2011

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“…New methods have been studied to improve the laser processing on materials [9,10] and in hard tissues [2,7,11]. Femtosecond laser process ing is useful for micromachining of materials to fab ricate micro and nano structured devices, where high spatial resolution and reduced thermal damage are required [12,13]. This is achieved due to the ultrashort time interaction between the laser pulse and the material [14].…”

Section: Introductionmentioning

confidence: 99%

Time progression of ultrashort laser ablation in a transparent material

et al. 2011

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Abstract-Laser ablation on the ultra short pulses regime (femtosecond), has an impact on materials pro cessing and micromachining in a quite profound ways. The investigation of the time progression of the laser ablation process within the material can produce much information and it is not conventionally used. The implementation of such study is the main aim of this paper. The temporal dependence of the diameter and depth of micro drilling in the sample was verified, beyond the simple understanding of the mechanism for plasma generated during the ablation. From the monitoring of the time progression of the ablation, the time dependence for the velocity of ablation had been determined. In most cases, fume attenuation of the incom ing laser beam and fume escape paths, produce dominant influence the characteristics of the region ablated. The method here employed is simple and can be carried out in real time without interruption of the process. In the implemented method light scattered from an auxiliary source allow visualization and record of the ablated geometry as it progress.

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Comparison of nano- and femtosecond laser ablation of aluminum

Cited by 18 publications

References 24 publications

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Femtosecond laser ablation on dental hard tissues—Analysis of ablated profile near an interface using local effective intensity

Time progression of ultrashort laser ablation in a transparent material

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