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

Maragkaki, Stella; Derrien, Thibault J.-Y.; Lévy, Yoann; Bulgakova, Nadezhda M.; Ostendorf, Andreas; Gurevich, Evgeny L.

doi:10.1016/j.apsusc.2017.02.068

Cited by 35 publications

(31 citation statements)

References 31 publications

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“…We demonstrate that LIPSS formation by single laser pulses is possible on incompletely smooth surface and propose a theoretical approach, which combines electrodynamic, hydrodynamic and two-temperature thermal conduction ideas. This paper summarizes and extends the main points of the proposed model, which were partly published in several papers [ 12 , 16 , 17 , 18 ], and provides a comparison of different materials as compared to our earlier work [ 17 ].…”

Section: Introductionmentioning

confidence: 60%

“…A typical example of the LIPSS imprinted on Al surface after single-pulse exposure by femtosecond laser Hurricane ( Spectra Physics ) at normal beam incidence is presented in Figure 1 . We note that the single-pulse LIPSS have periodicity close to laser wavelength [ 18 ] and are usually classified as low spatial frequency LIPSS (LSFL) [ 11 ]. We also mention that similar single-shot patterns were produced by pulses of a 1030 nm picosecond laser as well as by its second and third harmonics [ 18 ].…”

Section: Experimental Observationmentioning

confidence: 99%

“…We note that the single-pulse LIPSS have periodicity close to laser wavelength [ 18 ] and are usually classified as low spatial frequency LIPSS (LSFL) [ 11 ]. We also mention that similar single-shot patterns were produced by pulses of a 1030 nm picosecond laser as well as by its second and third harmonics [ 18 ]. This fact demonstrates that the formation of the single-shot LIPSS does not depend on prepulses and nano- or picosecond pedestals, which are usually present in ultrashort pulses [ 26 ].…”

Section: Experimental Observationmentioning

confidence: 99%

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Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals

2020

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Two different scenarios are usually invoked in the formation of femtosecond Laser-Induced Periodic Surface Structures (LIPSS), either “self-organization” mechanisms or a purely “plasmonic” approach. In this paper, a three-step model of formation of single-laser-shot LIPSS is summarized. It is based on the periodic perturbation of the electronic temperature followed by an amplification, for given spatial periods, of the modulation in the lattice temperature and a final possible relocation by hydrodynamic instabilities. An analytical theory of the evolution of the temperature inhomogeneities is reported and supported by numerical calculations on the examples of three different metals: Al, Au, and Mo. The criteria of the possibility of hydrodynamic instabilities are also discussed.

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Section: Introductionmentioning

confidence: 60%

Section: Experimental Observationmentioning

confidence: 99%

Section: Experimental Observationmentioning

confidence: 99%

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Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals

2020

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“…A further advantage, which attracts many researches to use ultrashort-pulsed lasers for surface processing is the arise of laser-induced periodic surface structures (LIPSS) in form of ripples during processing [22]. The ripple period, which is typically in the order of a few 100 nm [23,24], is slightly smaller than the wavelength of the laser used [24,25]. The ripples tend to melt together to larger structures when using longer pulse durations [26].…”

Section: Introductionmentioning

confidence: 99%

Transparent laser-structured glasses with superhydrophilic properties for anti-fogging applications

et al. 2019

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Ultrashort pulse laser structuring enables direct modification of glass surfaces to generate superhydrophilic properties for anti-fogging applications. This approach makes coatings dispensable and the generated surfaces remain thermally, mechanically, and chemically resistant. However, the laser-generated structures usually cause scattering, which decreases transmission and may disturb the vision through the modified glass in the dry state. The aim of this study was to find a laser-processing strategy to achieve superhydrophilic, anti-fogging properties on glass surfaces with maximum transmission and minimal visual perception of the generated structure. For this purpose, we used an ultrashort-pulsed laser to generate periodic patterns of rippled circles or rough holes with varying pitch. The water contact angle and transmission of the structured glasses were measured as a function of the structured area. It was found that a periodic pattern of holes, which covers less than 1% of the surface, is already sufficient to reach the superhydrophilic state (contact angle < 5°) and provides nearly the same transmission as pristine glass. Pictures of objects imaged through dry, structured glasses, which were placed close to the lens or object, showed in both cases only a minimal decrease of contrast. If this minor drawback can be accepted, this direct laser structuring approach could be an interesting alternative to coating-based techniques and leaves even room to apply additional coatings for the fabrication of multi-functional special glasses.

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“…It is very important though to be able to control the size of the period as the spectral regions of the observed colours are directly depending on the spatial periods of the ripples 13 . Experiments show that an easy method to control the ripples period under suitable laser parameters such as the laser fluence and the scanning speed is the laser wavelength 13,14 . In terms of applications, the colourisation of metallic surfaces is promising in anti-counterfeiting labelling, optical encryption, laser marking and optical data storage [15][16][17] .…”

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confidence: 99%

Influence of defects on structural colours generated by laser-induced ripples

Maragkaki

Skaradzinski

Nett

et al. 2020

Sci Rep

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The colourisation of metallic surface which appears due to periodic surface patterns induced by ultrashort laser pulses is studied. Ripples due to the sub-micrometer size of their period act as a diffraction grating, generating structural colours. Carefully chosen strategy of the laser spot scanning allows us to mimic the nanostructures responsible for structural colours of some flowers on the metal substrate. We investigate the correlation between the colourising effects and the artificially-induced defects in the ripples structure and show that these defects can make the colours observable in a larger range of viewing angles. Further we address the influence of the processing parameters on the spectral profile of the reflected light.

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

Cited by 35 publications

References 31 publications

Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals

Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals

Transparent laser-structured glasses with superhydrophilic properties for anti-fogging applications

Influence of defects on structural colours generated by laser-induced ripples

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