Thermocavitation melt instability and micro-crown formation near the threshold for femtosecond laser spallation of a silicon surface

Emel’yanov, V. I.; Данилов, П. А.; Zayarnyĭ, D A; Ионин, А. А.; Kudryashov, S. I.; Makarov, Sergey; Rudenko, A. A.; Shikunov, D. I.; Yurovskikh, V. I.

doi:10.1134/s0021364014150053

Cited by 14 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2b). It is noteworthy that similar linear dependence of periodically arranged nanospikes N on the nanocrown radius was also observed in the case of ns-pulse irradiation of the Au film on a copper substrate [9] and fs-pulse irradiation of bulk Si surface [20], although the shape and the size of the obtained submicron spikes in the abovementioned cases was somewhat different. This presumably points out the universal nature of the hydrodynamic thermocapillary/thermocavitation (Marangoni, Rayleigh-Plateau) instabilities appearing in the molten material rim, despite the fact that formation processes of such rim for thin film and bulk samples obviously can significantly differ.…”

Section: Nanocrowns and Nanojets Formationsupporting

confidence: 64%

Laser ablative fabrication of nanocrowns and nanojets on the Cu supported film surface using femtosecond laser pulses

Kuchmizhak

Павлов

Vitrik

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Please cite this article in press as: A.A. Kuchmizhak, et al., Laser ablative fabrication of nanocrowns and nanojets on the Cu supported film surface using femtosecond laser pulses, Appl. Surf. Sci. (2015), http://dx. a b s t r a c tFormation dynamics of the nanojets and nanocrowns induced on the surface of the Cu supported films of different thickness under the impact of tightly focused femtosecond pulses was studied in detail. We show that the single-shot fs-pulse irradiation of the 120-nm-thick Cu film results in formation of a single nanojet, which splits at increased pulse energy into two and then into a plurality of periodically arranged nanospikes eventually acquiring the form of the so-called nanocrown. The number of nanospike in the nanocrown was found to be linearly dependent on the pulse energy and nanocrown radius. The key role of subsurface boiling occurring on the metal film-substrate interface in the formation process of crown-like nanostructures was revealed by comparing the obtained results with the formation dynamics studied for thinner 60-nm and 20-nm-thick Cu films. In addition, the applicability of the fabricated nanostructures as low-cost substrate for photoluminescence signal enhancement of the organic dyes is also discussed in this paper.

show abstract

Section: Nanocrowns and Nanojets Formationsupporting

confidence: 64%

Laser ablative fabrication of nanocrowns and nanojets on the Cu supported film surface using femtosecond laser pulses

Kuchmizhak

Павлов

Vitrik

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…Traces of the melt formed due to the mechanism of a phase explosion. The observed crater rims were considered in terms of spallative rims and the related capillary processes near crater edges [23,24]. We have performed additional detailed oxidation tests for the stainless steel and found their oxidation to be neglible (<1%) (figure 2(c)).…”

Section: Morphology Of Craters and Ablation Thresholdsmentioning

confidence: 99%

Microprocessing of a steel surface by single pulses of variable width

et al. 2019

View full text Add to dashboard Cite

Single-pulse microprocessing of a steel surface with a variable pulse width (0.3–12.3 ps) and a wavelength of 515 nm was performed. The morphology of the craters was visualized by a scanning electron microscope and an optical profilometer. The nonmonotonic behavior of ablation thresholds with a minimum at ≈1.5 ps, due to achieving the electron–phonon relaxation time of the absorbed energy in the steel was revealed. It is shown that, with an increase in the pulse width in the considered width range, the efficiency of the ablation decreases by a factor of 2, which is explained by the partial transition from the phase explosion to the surface evaporation.

show abstract

“…A rather good approximation in understanding the mecha nisms of nanoscale ablation is the description of mac roscopic femtosecond (fs) laser ablation provided in a number of recent studies [9][10][11][12][13][14][15]. In particular, it was demonstrated that spallative femtosecond laser abla tion of thin films and bulk materials is initiated by delayed subsurface boiling of a molten layer [13,14], rather than thermoelastic stresses, with picosecond evaporative cooling of the layer suppressing its phase explosion [15].…”

mentioning

confidence: 99%

Nanoscale boiling during single-shot femtosecond laser ablation of thin gold films

et al. 2015

Self Cite

View full text Add to dashboard Cite

A nanoscale chaotic relief structure appears as a result of subthreshold single shot femtosecond laser ablation of gold films in the regimes of fabrication of microbumps and nanospikes, but only for a relatively thick film. The observed nanoablation tendency versus film thickness makes it possible to suppose the existence of a sub surface temperature maximum in thicker gold films and its absence within thinner film, which results from competing evaporative cooling and electronic heat conduction, as demonstrated by numerical simulations of the thermal dynamics.

show abstract

Thermocavitation melt instability and micro-crown formation near the threshold for femtosecond laser spallation of a silicon surface

Cited by 14 publications

References 22 publications

Laser ablative fabrication of nanocrowns and nanojets on the Cu supported film surface using femtosecond laser pulses

Laser ablative fabrication of nanocrowns and nanojets on the Cu supported film surface using femtosecond laser pulses

Microprocessing of a steel surface by single pulses of variable width

Nanoscale boiling during single-shot femtosecond laser ablation of thin gold films

Contact Info

Product

Resources

About