Nanoscale surface boiling in sub-threshold damage and above-threshold spallation of bulk aluminum and gold by single femtosecond laser pulses

Ионин, А. А.; Kudryashov, S. I.; Makarov, Sergey; Левченко, А. В.; Rudenko, A. A.; Сараева, И. Н.; Zayarny, D. A.; Nathala, Chandra R; Husinsky, W.

doi:10.1088/1612-2011/13/2/025603

Cited by 38 publications

(20 citation statements)

References 45 publications

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“…[28,29] First explanations connecting the RSS and foaming/rupture of foam and fast (before their disappearance thanks to surface tension) freezing of the cellular capillary remnants of foam (the remnants are: membranes, jets, and droplets) were given in ref. [32][33][34][35][36]. [32][33][34][35][36].…”

Section: Structure Of High-entropy Layer According To MDmentioning

confidence: 99%

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Petrov

Inogamov

Zhakhovsky

et al. 2019

Contributions to Plasma Physics

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Physical processes involved in laser ablation in liquid (LAL) are studied using a gold target irradiated through transparent water. During and after irradiation, the heated material from the surface of a target produces a plume that expands into liquid-forming nanoparticles (NPs). The LAL method of NP production is ecologically much cleaner than others. A better understanding of the processes associated with complicated hydrodynamic phenomena leading to LAL is important for controlled manufacturing. We consider laser pulses with different durations L covering fifth orders of magnitudes ranging from 0.1 ps to 0.5 ns and large absorbed fluences F abs near optical breakdown of liquid. It is shown that the trajectory of the contact boundary with liquid at the middle and late stages after passing the maximum intensity of the longest pulse is rather similar for very different pulse durations if energies F abs are comparable. We trace how hot (in a few eV range) dense gold plasma expands, cools down, intersects a saturation curve, and condenses into NPs appearing first inside the water-gold diffusively mixed intermediate layer where gold vapour has the lowest temperature. Later, the pressure around the gold-water contact drops down below the critical pressure for water. As a result, the nanoparticles find themselves in gaseous water bubble where density of water gradually decreases to 10 −4 − 10 −5 g/cm 3 at maximum bubble expansion. K E Y W O R D Slaser ablation in liquid, laser gold plasma, nanoparticles

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Section: Structure Of High-entropy Layer According To MDmentioning

confidence: 99%

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Petrov

Inogamov

Zhakhovsky

et al. 2019

Contributions to Plasma Physics

View full text Add to dashboard Cite

show abstract

“…This picture is also supported by other studies on metals and dielectrics. Corresponding mechanisms were discussed for Ag, Au, and Ti under high fluence excitation [39,40], and for volume structures in glasses [42,71] (where surface plasmons, however, may be replaced by the coupling of many local plasmons). The ripple formation at the surface of fused silica is explained by the interplay of plasmons and incubation effects (accumulation of defect sites) [72].…”

Section: Initial Pulse (N = 1)mentioning

confidence: 99%

“…For metals like Ti, Al, and Au, it was shown that nanoscale surface boiling plays a role in sub-threshold damage, as well as above-threshold spallation by femtosecond laser pulses [39,40]. Although thermal material modification and rearrangement were detected at different time scales compared to the exciting light pulses, the ripple formation is significantly influenced by plasmons initially induced by the ultrafast laser pulses [39]. These findings indicate that a combination of sub-surface bubble generation and plasmon-related spatially periodical energy insertion results in the generation of isolated or merged nanovoids, depending on the fluence.…”

Section: Introductionmentioning

confidence: 99%

Feedback-Driven Plasmonic-Thermal Route to Femtosecond-Laser-Induced Periodic Surface Structures in Silicon Indicated by Pump-Probe Scattering and Diffraction

Wehner

Grünwald

2019

Surfaces

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The self-organized formation of nanoscale laser-induced periodic surface structures (LIPSS) is still not fully understood with respect to the dynamics and interplay of contributing complex mechanisms. The transition from randomness to order and the specific role of nano-feedback are of fundamental interest because of their general aspects. In our study, the very first steps of the surface reconfiguration are demonstrated by analyzing the topology of evolving nano-crater maps. The evolution of spatial frequencies and directional arrangement indicate a feedback-driven adaptation of k-vectors to the required excitation conditions of elementary dipoles in the linearly polarized laser field. The time-dependent structure formation was studied by pump-probe diffraction and scattering experiments. The ratio of the contributions of characteristic light patterns enables plasmonic and non-plasmonic mechanisms to be distinguished, which subsequently act at distinctly different time scales. Recently developed multistage models for the dynamics of material modification are confirmed. The influence of accumulation effects is clearly demonstrated by characteristic changes in scattering and diffraction with an increasing number of preceding pulses. It is assumed that the thermal and plasmonic contributions to accumulation are coupled and thus generate spatially variable modifications.

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“…The polarization dependence of LIPSS formation [90] also confirms a plasmonic mechanism. Thermal material modification and rearrangement appear at later time scales but are strongly influenced by plasmons [91]. The ripple orientation, however, can be parallel or perpendicular to the polarization vector so that the scenario seems to be complex in detail (e.g.…”

Section: Laser-induced Periodic Surface Structures (Lipss)mentioning

confidence: 99%

Interaction of Ultrafast Laser Pulses With Nanostructure Surfaces

Lübcke¹,

Schnürer²,

Ehrentraut³

et al. 2018

Encyclopedia of Interfacial Chemistry

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The interaction of ultrafast laser pulses with surfaces on the nanoscale paves the way for various innovative technologies in spectroscopy, photovoltaics, photocatalysis, or medicine, to mention only a few. The basic mechanisms, however, are still the subject of intense research. We take a closer look at this topic from different viewpoints. The first aspect is the enhancement of the efficiency of physical or chemical processes by producing local field maxima and resonances at top-down or bottom-up structured surfaces. A further aspect is the dynamic change of optical properties by inducing free carriers and plasmons. Last but not least, permanent nanostructures can be obtained as a result of nano-feedback and self-organization. In high-energy laser physics, all three aspects play a role at once. Therefore, particular attention will be paid to this emerging field.

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Nanoscale surface boiling in sub-threshold damage and above-threshold spallation of bulk aluminum and gold by single femtosecond laser pulses

Cited by 38 publications

References 45 publications

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Feedback-Driven Plasmonic-Thermal Route to Femtosecond-Laser-Induced Periodic Surface Structures in Silicon Indicated by Pump-Probe Scattering and Diffraction

Interaction of Ultrafast Laser Pulses With Nanostructure Surfaces

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