Emission features and expansion dynamics of nanosecond laser ablation plumes at different ambient pressures

Farid, Nagy A.; Harilal, S. S.; Ding, Hongbin; Hassanein, A.

doi:10.1063/1.4862167

Cited by 180 publications

(82 citation statements)

References 55 publications

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“…Samples M3 and M4 were obtained upon laser irradiation in vacuum under the conditions reported in Table 1). Due to the easy formation of plasma plumes of ablated material under vacuum 30,31 and in order to keep the ablation process to a manageable limit laser irradiances were much smaller in the experiments under vacuum than in air., In fact, plasma plumes were easily observed with the naked eyes (conveniently protected with UV filters) during vacuum treatment, while they were not observed during treatment in air. For example, the lower irradiance used for sample M3…”

Section: Coloring By Laser Treatment In Vacuummentioning

confidence: 99%

Laser Treatment of Nanoparticulated Metal Thin Films for Ceramic Tile Decoration

Rico

Lahoz²,

Rey-García

et al. 2016

ACS Appl. Mater. Interfaces

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Section: Coloring By Laser Treatment In Vacuummentioning

confidence: 99%

Laser Treatment of Nanoparticulated Metal Thin Films for Ceramic Tile Decoration

Rico

Lahoz²,

Rey-García

et al. 2016

ACS Appl. Mater. Interfaces

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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: 95%

“…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%

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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“…The atmospheric gas is compressed and heated by the shock wave. When both the laser intensity and the ambient gas density are sufficiently high, a laser-supported detonation (LSD) wave 3,15,16,20,21 propagates away from the target surface. The laser beam energy is partly absorbed by the LSD wave.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the efforts of computational [11][12][13][14] and experimental [15][16][17][18][19] studies to date, the prediction of the global energy balance remains difficult. The energy conversion from the laser to the kinetic energy of the ablation plume in a rare-gas atmosphere has been measured experimentally.…”

Section: Introductionmentioning

confidence: 99%

Energy conversion and momentum coupling of the sub-kJ laser ablation of aluminum in air atmosphere

Mori

Maruyama

Shimamura

2015

Journal of Applied Physics

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Energy conversion and momentum coupling using nano-second 1-μm-wavelength pulse laser irradiation on an aluminum target were measured in air and nitrogen gas atmospheres over a wide range of laser pulse energies from sub-J to sub-kJ. From the expansion rate of the shock wave, the blast-wave energy conversion efficiency, ηbw, was deduced as 0.59 ± 0.02 in the air atmosphere at an ambient pressure from 30 to 101 kPa for a constant laser fluence at 115 J/cm2. Moreover, the momentum coupling of a circular disk target was formulated uniquely as a function of the dimensionless shock-wave radius and the ratio of the laser spot radius to the disk radius, while ηbw could be approximated as constant for the laser fluence from 4.7 to 4.1 kJ/cm2, and the ambient pressure from 0.1 to 101 kPa.

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Emission features and expansion dynamics of nanosecond laser ablation plumes at different ambient pressures

Cited by 180 publications

References 55 publications

Laser Treatment of Nanoparticulated Metal Thin Films for Ceramic Tile Decoration

Laser Treatment of Nanoparticulated Metal Thin Films for Ceramic Tile Decoration

Nanosecond Laser Ablation: Mathematical Models, Computational Algorithms, Modeling

Energy conversion and momentum coupling of the sub-kJ laser ablation of aluminum in air atmosphere

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