Flexible periodical micro- and nano-structuring of a stainless steel surface using dual-wavelength double-pulse picosecond laser irradiation

Gedvilas, Mindaugas; Mikšys, Justinas; Račiukaitis, Gediminas

doi:10.1039/c5ra14210e

Cited by 35 publications

(14 citation statements)

References 55 publications

(81 reference statements)

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“…In real situations, it can be larger for the electrons and, as mentioned above, is changing in time; 3. The system was linearized, i.e., only the terms proportional to the perturbation amplitude are kept while higher-order terms are neglected in the system (5).…”

Section: Discussionmentioning

confidence: 99%

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Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

et al. 2017

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In this paper we investigate whether the periodic structures on metal surfaces exposed to single ultrashort laser pulses can appear due to an instability induced by two-temperature heating dynamics. The results of two-temperature model (TTM) 2D simulations are presented on the irradiation of gold by a single 800 nm femtosecond laser pulse whose intensity is modulated in order to reproduce a small initial temperature perturbation, which can arise from incoming and scattered surface wave interference. The growing (unstable) modes of the temperature distribution along the surface may be responsible for the LIPSS (Laser Induced Periodic Surface Structures) formation.After the end of the laser pulse and before the complete coupling between lattice and electrons occurs, the evolution of the amplitude of the subsequent modulation in the lattice temperature reveals different tendencies depending on the spatial period of the initial modulation.This instability-like behaviour is shown to arise due to the perturbation of the electronic temperature which relaxes slower for bigger spatial periods and thus imparts more significant modulations to the lattice temperature. Small spatial periods of the order of 100 nm and smaller experience stabilization and fast decay from the more efficient lateral heat diffusion which facilitates the relaxation of the electronic temperature amplitude due to in-depth diffusion. An analytical instability analysis of a simplified version of the TTM set of equations supports the lattice temperature modulation behaviour obtained in the simulations and reveals that in-depth diffusion length is a determining parameter in the dispersion relation of unstable modes. Finally it is discussed how the change in optical properties can intensify the modulation-related effects.PACS numbers:

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Section: Discussionmentioning

confidence: 99%

“…Short and ultrashort laser pulses are known to generate LIPSS (Laser Induced Periodic Surface Structures) or ripples on the surfaces of metals, dielectrics and semiconductors. The pattern appears if the surface is exposed to multiple [1,2] or even single [3][4][5] laser shots.…”

Section: Introductionmentioning

confidence: 99%

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

et al. 2017

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“…For multi-pulse irradiation regimes, it was argued that the plasmonic stage, which governs the laser-induced periodic surface structures’ orientation, does not necessarily determine the periodicity of the final pattern due to the contribution of thermocapillary effects [119]. The hydrodynamic processes can be more and more important in the formation of the periodic surface structures at high laser fluence for which the metal melting and ablation depths are larger [120,121]. From an experimental point of view, Maragkaki et al [109] produced the laser-induced periodic surface structures on a Cu (bulk target) polished surface at three different wavelengths (355, 532, 1064 nm) of a laser pulse with a duration of 7 ns.…”

Section: Nanostructuration Of Thin Metal Films By Picosecond Pulsementioning

confidence: 99%

Nanostructuration of Thin Metal Films by Pulsed Laser Irradiations: A Review

Ruffino

Grimaldi

2019

Nanomaterials

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Metal nanostructures are, nowadays, extensively used in applications such as catalysis, electronics, sensing, optoelectronics and others. These applications require the possibility to design and fabricate metal nanostructures directly on functional substrates, with specifically controlled shapes, sizes, structures and reduced costs. A promising route towards the controlled fabrication of surface-supported metal nanostructures is the processing of substrate-deposited thin metal films by fast and ultrafast pulsed lasers. In fact, the processes occurring for laser-irradiated metal films (melting, ablation, deformation) can be exploited and controlled on the nanoscale to produce metal nanostructures with the desired shape, size, and surface order. The present paper aims to overview the results concerning the use of fast and ultrafast laser-based fabrication methodologies to obtain metal nanostructures on surfaces from the processing of deposited metal films. The paper aims to focus on the correlation between the process parameter, physical parameters and the morphological/structural properties of the obtained nanostructures. We begin with a review of the basic concepts on the laser-metal films interaction to clarify the main laser, metal film, and substrate parameters governing the metal film evolution under the laser irradiation. The review then aims to provide a comprehensive schematization of some notable classes of metal nanostructures which can be fabricated and establishes general frameworks connecting the processes parameters to the characteristics of the nanostructures. To simplify the discussion, the laser types under considerations are classified into three classes on the basis of the range of the pulse duration: nanosecond-, picosecond-, femtosecond-pulsed lasers. These lasers induce different structuring mechanisms for an irradiated metal film. By discussing these mechanisms, the basic formation processes of micro- and nano-structures is illustrated and justified. A short discussion on the notable applications for the produced metal nanostructures is carried out so as to outline the strengths of the laser-based fabrication processes. Finally, the review shows the innovative contributions that can be proposed in this research field by illustrating the challenges and perspectives.

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“…For multi-pulse irradiation regimes, it was concluded that the plasmonic stage, which governs the LIPSS orientation, does not necessary determine the periodicity of the final pattern due to contribution of the thermocapillary effects [15]. The hydrodynamic processes can be even more important for the LIPSS produced by single laser pulses at relatively high fluences assuming relatively deep melting and strong ablation of material [16,17]. Additionally, the hydrodynamic theory is supported by the topology of the pattern, which can be transient between the LIPSS and cell-like structures [17], that is typical for the hydrodynamic systems.…”

Section: Introductionmentioning

confidence: 99%

Wavelength dependence of picosecond laser-induced periodic surface structures on copper

Maragkaki

Derrien

Lévy

et al. 2017

Applied Surface Science

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Email addresses: maragkaki@lat.rub.de (Stella Maragkaki),The physical mechanisms of the laser-induced periodic surface structures (LIPSS) formation are studied in this paper for single-pulse irradiation regimes. The change in the LIPSS period with wavelength of incident laser radiation is investigated experimentally, using a picosecond laser system, which provides 7-ps pulses in near-IR, visible, and UV spectral ranges. The experimental results are compared with predictions made under the assumption that the surface-scattered waves are involved in the LIPSS formation. Considerable disagreement suggests that hydrodynamic mechanisms can be responsible for the observed pattern periodicity.

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Flexible periodical micro- and nano-structuring of a stainless steel surface using dual-wavelength double-pulse picosecond laser irradiation

Abstract: The picosecond laser-induced ripple formation on a stainless steel surface upon irradiation with linearly-polarized single-pulse and dual-wavelength cross-polarized double-pulse trains in air was studied experimentally.

Cited by 35 publications

References 55 publications

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

Nanostructuration of Thin Metal Films by Pulsed Laser Irradiations: A Review

Wavelength dependence of picosecond laser-induced periodic surface structures on copper

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