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Micromachines 2014, 5(4), 1344-1372; doi:10.3390/mi5041344

Impacts of Ambient and Ablation Plasmas on Short- and Ultrashort-Pulse Laser Processing of Surfaces

1
Kutateladze Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., 630090 Novosibirsk, Russia
2
HiLASE Project, Institute of Physics ASCR, Na Slovance 2, 18221 Prague, Czech Republic
3
Institute of High-Current Electronics SB RAS, 2/3 Akademichesky Ave., 634055 Tomsk, Russia
4
National Research Tomsk State University, 36, Lenin Ave., 634050 Tomsk, Russia
5
Institute of Computational Technologies SB RAS, 6 Lavrentyev Ave., 630090 Novosibirsk, Russia
6
Novosibirsk State Technical University, 20 Karl Marx ave., 630073 Novosibirsk, Russia
7
Lebedev Physical Institute, 53 Leninsky Ave., 119991 Moscow, Russia
8
Institut Lumière Matière, Université de Lyon, Université Lyon 1, CNRS UMR5306, Villeurbanne F-69622, France
9
Aix-Marseille University, CNRS (Centre National de la Recherche Scientifique), CINAM UMR7325, F-13288 Marseille, France
10
EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, UK
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 17 November 2014 / Accepted: 3 December 2014 / Published: 9 December 2014
(This article belongs to the Special Issue Laser Micro- and Nano- Processing)
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Abstract

In spite of the fact that more than five decades have passed since the invention of laser, some topics of laser-matter interaction still remain incompletely studied. One of such topics is plasma impact on the overall phenomenon of the interaction and its particular features, including influence of the laser-excited plasma re-radiation, back flux of energetic plasma species, and massive material redeposition, on the surface quality and processing efficiency. In this paper, we analyze different plasma aspects, which go beyond a simple consideration of the well-known effect of plasma shielding of laser radiation. The following effects are considered: ambient gas ionization above the target on material processing with formation of a “plasma pipe”; back heating of the target by both laser-driven ambient and ablation plasmas through conductive and radiative heat transfer; plasma chemical effects on surface processing including microstructure growth on liquid metals; complicated dynamics of the ablation plasma flow interacting with an ambient gas that can result in substantial redeposition of material around the ablation spot. Together with a review summarizing our main to-date achievements and outlining research directions, we present new results underlining importance of laser plasma dynamics and photoionization of the gas environment upon laser processing of materials. View Full-Text
Keywords: pulsed laser ablation; laser material processing; laser plasma; ambient gas breakdown; material redeposition; plasma pipe formation; microstructures on liquid metals pulsed laser ablation; laser material processing; laser plasma; ambient gas breakdown; material redeposition; plasma pipe formation; microstructures on liquid metals
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bulgakova, N.M.; Panchenko, A.N.; Zhukov, V.P.; Kudryashov, S.I.; Pereira, A.; Marine, W.; Mocek, T.; Bulgakov, A.V. Impacts of Ambient and Ablation Plasmas on Short- and Ultrashort-Pulse Laser Processing of Surfaces. Micromachines 2014, 5, 1344-1372.

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