Role of laser-induced plasma in ultradeep drilling of materials by nanosecond laser pulses

Bulgakova, Nadezhda M.; Evtushenko, Anton B.; Shukhov, Yuri G.; Kudryashov, S. I.; Bulgakov, Alexander V.

doi:10.1016/j.apsusc.2011.07.126

Cited by 74 publications

(39 citation statements)

References 30 publications

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“…While the role of the recoil pressure of plasma plumes under PLA is extensively discussed in the literature (see, e.g., [46][47][48][49]), detailed analysis of the plasma reradiation effects on the ablation process is still lacking. Only recently comprehensive experimental and theoretical studies were performed, which have shown that the radiating laser-ablation plasma can dramatically influence the ablation dynamics, leading to the formation of ultradeep craters [50][51][52]. On the example of graphite, it was clearly demonstrated that ultradeep crater formation can only be explained based on the concept of ablation plasma absorption and reradiation [50,51].…”

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

“…Ablative craters produced in the regimes of volumetric material ejection can be very deep reaching, in some cases, several or even tens of micrometers in depth per pulse [40,45,55]. Such ultradeep laser drilling cannot result from a common heat conduction transport into the target bulk and was suggested to be due to ablative laser plasma effects [45,50].…”

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

“…Only recently comprehensive experimental and theoretical studies were performed, which have shown that the radiating laser-ablation plasma can dramatically influence the ablation dynamics, leading to the formation of ultradeep craters [50][51][52]. On the example of graphite, it was clearly demonstrated that ultradeep crater formation can only be explained based on the concept of ablation plasma absorption and reradiation [50,51]. Graphite, which melts at pressures ≥100 bar and has a relatively small gap between the melting and boiling temperatures at the same pressure, is the brightest example of the plasma feedback effect though the latter has a universal character regarding the type of material [52].…”

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

“…To prove the concept put forward in [45], the experiments were performed supported by numerical modeling [50]. Ablation of a polycrystalline graphite plate was carried out under vacuum conditions .…”

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

“…Hence, the observed transition to the ultradeep ablation can be attributed to the formation of a thick layer of molten graphite whose explosive vaporization together with the high recoil pressure leads to sharp deepening of the crater. A three-stage theoretical model was proposed [50] aiming at elucidating the dynamics of heating, melting, and ablation of graphite under these experimental conditions in order to get an insight into a possible role of the laser ablation plasma in the ultradeep ablation process. In the first stage, the thermal model with accounting for the plasma shielding effect was employed [6,40,42,50].…”

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

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

et al. 2014

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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 OPEN ACCESSMicromachines 2014, 5 1345 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.

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Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

Section: Plasma-assisted Ultradeep Ablationmentioning

confidence: 99%

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

et al. 2014

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Insight into the plasma oxidation process during pulsed laser deposition

Irimiciuc

Chertopalov

Bulı́ř

et al. 2021

Plasma Processes & Polymers

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The dynamics of transient plasmas generated by ns laser ablation of Ag targets under various O 2 gas pressures (10 −5 -10 Pa) were investigated by implementing angle-and time-resolved Langmuir probe (LP) analysis and space-and timeresolved optical emission spectroscopy (OES). The effects of an O 2 atmosphere on silver oxide formation and the ionic kinetics and the overall plasma energy were systematically investigated. Measurements performed in the LP floating regime revealed the presence of three-ionic structures with kinetic energies varying from 0.8 to 350 eV, which can be tailored by the addition of O 2 . The timemodulated regime of electron temperature in the 0.5-3 eV observed for pressures higher than 2 Pa of O 2 could be explained by the formation and dissociation of silver oxide molecules. The energetic balance sustains molecular oxide formation, as confirmed by OES measurements, which revealed emission signatures of AgO (B 2 Π 3/2 and X 2 Π 3/2 ) in the 350 nm (B 2 Π 3/2 ) and 460 nm (X 2 Π 3/2 ) spectral regions. Finally, thin films were deposited to understand the range of possibilities offered by pulsed laser deposition of Ag in O 2 . The morphology and atomic structure of the films were analysed for large-scale deposition. Silver oxides were detected in the films starting from 2 Pa, while at higher values, we found mixtures of different Ag x O y phases. A cauliflower-like morphology was dominant above 5 Pa of O 2 atmosphere pressures, which signals the formation of the AgO phase in the deposited film. Our results demonstrate that the properties of deposited thin films are influenced by plasma properties.

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Laser-Induced Thermal Processes: Heat Transfer, Generation of Stresses, Melting and Solidification, Vaporization, and Phase Explosion

Shugaev

Lévy

et al. 2021

Handbook of Laser Micro- And Nano-Engineering

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Role of laser-induced plasma in ultradeep drilling of materials by nanosecond laser pulses

Cited by 74 publications

References 30 publications

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

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

Insight into the plasma oxidation process during pulsed laser deposition

Laser-Induced Thermal Processes: Heat Transfer, Generation of Stresses, Melting and Solidification, Vaporization, and Phase Explosion

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