Formation and crystallisation of a liquid jet in a film exposed to a tightly focused laser beam

Анисимов, С. И.; Zhakhovsky, V. V.; Inogamov, N. A.; Murzov, S. A.; Хохлов, В. А.

doi:10.1070/qel16381

Cited by 22 publications

(10 citation statements)

References 40 publications

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“…Thermocapillary and Marangoni effects as well as Rayleigh–Plateau instability have been identified to influence the structure formation and its disintegration process [ 23 , 24 ]. Later on, however, the relaxation of the laser-induced stresses, generated in the vicinity of the target’s surface as a result of the laser heating, has been determined as a main driving mechanism responsible for the nanostructures growth [ 25 , 26 , 27 ]. The specifics of the final nanostructures shape depend on the material as well as on the laser parameters, the dynamical changes of the reflectivity of the material [ 28 , 29 ], and the geometric parameters of the irradiation pattern.…”

Section: Introductionmentioning

confidence: 99%

Formation of Periodic Nanoridge Patterns by Ultrashort Single Pulse UV Laser Irradiation of Gold

et al. 2020

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A direct comparison of simulation and experimental results of UV laser-induced surface nanostructuring of gold is presented. Theoretical simulations and experiments are performed on an identical spatial scale. The experimental results have been obtained by using a laser wavelength of 248 nm and a pulse length of 1.6 ps. A mask projection setup is applied to generate a spatially periodic intensity profile on a gold surface with a sinusoidal shape and periods of 270 nm, 350 nm, and 500 nm. The formation of structures at the surface upon single pulse irradiation is analyzed by scanning and transmission electron microscopy (SEM and TEM). For the simulations, a hybrid atomistic-continuum model capable of capturing the essential mechanisms responsible for the nanostructuring process is used to model the interaction of the laser pulse with the gold target and the subsequent time evolution of the system. The formation of narrow ridges composed of two colliding side walls is found in the simulation as well as in the experiment and the structures generated as a result of the material processing are categorized depending on the range of applied fluencies and periodicities.

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Section: Introductionmentioning

confidence: 99%

Formation of Periodic Nanoridge Patterns by Ultrashort Single Pulse UV Laser Irradiation of Gold

et al. 2020

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“…Interestingly, these surface pinching and protrusion free features are different from most of the reported laser-induced nano-jetting phenomenon generated from ultra-thin metal films [10][11][12][13][14][15][16]. In those cases, the jetting process involved with the competition between inertia-capillary dynamics and crystallization, in which the jet elongates and breaks up into droplets due to the Plateau-Rayleigh instability and the formation of a neck occurs in the solidification zone between the crystalline and liquid parts of the jet [17].…”

Section: Dynamics Above Escape Thresholdmentioning

confidence: 62%

“…Within this dome shell the normal component of the capillary force decelerates the normal velocity of the shell and the parallel component leads to the displacement of the shell material towards the center. Taken these effects all together, a jet starts to form when the reverse motion of the shell begins [17]. A difference with the DP-LIFT situation is the diameter of the melted area which is only 1 to 2 orders of magnitude larger than the dimension of the ultrafast laser spot used in these experiments.…”

Section: Introductionmentioning

confidence: 91%

“…However, in the DP-LIFT situation, the typical thickness of the donor film is below 1000 nm, and thus, such a cavitation bubble driving mechanism would require a strong downscaling of the bubble size and make it unlikely. Besides, laser-induced nano-jetting from ultra-thin (<100 nm) solid donor films has been reported and investigated experimentally [10][11][12][13][14][15][16] and theoretically [17][18][19]. In these experiments, an ultrashort pulse irradiates the thin film with a Gaussian beam profile which induces a Gaussian distributed pressure force in a film melted over its full thickness in the irradiated area.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of double-pulse laser printing of copper microstructures

Grojo

Alloncle

et al. 2019

Applied Surface Science

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Laser induced forward transfer process can be implemented in a double-pulse scheme where a solid thin film deposited on a transparent donor substrate is irradiated by two synchronized lasers. In a recently demonstrated methodology, a long pulse is first applied to melt the film and an appropriately delayed ultrashort laser pulse initiates material transfer in the liquid phase toward a receiver substrate. This provides a versatile method to print high-resolution (<2 µm) patterns with a long working distance (>40 µm). In this paper we focus on the study of the dynamical aspects associated with these printing performances. The temperature evolution of the thin copper film during irradiation with a quasi-continuous wave (QCW) pulse is calculated. By combining the calculations with time-resolved imaging experiments, we reveal the influence of the copper film temperature and molten metal diameter on the ejection dynamics. Characterization of the transferred materials shows that the delay between the two laser pulses is a control parameter for the shape and volume of the printed structures. This is finally exploited to demonstrate high-precision printing of different debris-free microstructures onto a Si receiver substrate set as far as 60 µm away from the donor film.

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“…Moreover, with the motivation of addressing nanofabrication applications, laser-induced nano-jetting phenomena from solid donor films (< 1000 nm) has also been reported [20]. This was a subject of several experimental [21][22][23][24][25][26] and theoretical [27][28][29] studies. In that approach, an accurate combination of the film thickness, laser pulse duration, and energy allows with a single laser irradiation to both melt the whole film thickness and provide the relevant energy to deform the melted film and form the nanojet.…”

Section: Introductionmentioning

confidence: 97%

Jetting regimes of double-pulse laser-induced forward transfer

Li¹,

Grojo²,

Alloncle³

et al. 2019

Opt. Mater. Express

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We use the double-pulse laser-induced forward transfer (DP-LIFT) process, combining a quasi-continuous wave (QCW) and a femtosecond (fs) laser pulse to achieve jetting from a 1-µm thick copper film. The influence of the fs laser fluence on the dynamics of the liquid copper jetting is experimentally investigated by time-resolved shadowgraphy and theoretically analyzed with a simple energy balance model. Different jetting regimes are identified when varying the fs laser fluence. We demonstrate that the adjustment of this latter parameter while keeping all the others constant, allows accurate control of the diameter of the printed droplets from 1.9 µm to 6.0 µm. This leads us to a demonstration in which we print debris-free micro-pillars with an aspect ratio of 19 onto a silicon receiver substrate set as far as 60 µm away from the donor film.

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Formation and crystallisation of a liquid jet in a film exposed to a tightly focused laser beam

Cited by 22 publications

References 40 publications

Formation of Periodic Nanoridge Patterns by Ultrashort Single Pulse UV Laser Irradiation of Gold

Formation of Periodic Nanoridge Patterns by Ultrashort Single Pulse UV Laser Irradiation of Gold

Dynamics of double-pulse laser printing of copper microstructures

Jetting regimes of double-pulse laser-induced forward transfer

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