Large-Beam Picosecond Interference Patterning of Metallic Substrates

Hauschwitz, Petr; Jochcova, D.; Jagdheesh, R.; Cimrman, Martin; Brajer, Jan; Rostohar, Danijela; Mocek, Tomáš; Kopeček, Jaromı́r; Lucianetti, Antonio; Smrž, Martin

doi:10.3390/ma13204676

Cited by 14 publications

(12 citation statements)

References 29 publications

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“…setup with a clear deviation between the interference and the focal plane and an elliptical spot shape on a stainless steel sample fabricated by the setup[53] Schematic of the fabrication steps and the morphology of the triple-scale micro/nanostructured superhydrophobic surfaces: (a−c) The two basic steps to build the structures, that is, ultrafast laser ablation and chemical oxidation; (d−d 2 ) typical morphologies of the triple-scale micro/nano structures[62] …”

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confidence: 99%

Laser processing of micro/nano biomimetic structures

Xiao

Liu

et al. 2021

Micro & Nano Letters

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Inspired by nature, many researchers have noticed that the micro-and nano-structures originated from organism's surfaces which indict unique properties such as superhydrophobicity, drag reduction, structure colour have much use in academic value. However, conventional processing methods for mimicking biomimetic surface need multistep and is time wasted, not environmental friendly and uneconomic. Thanks to the development of ultrafast laser technology, the pulse duration can reach femtosecond scale, which can precisely realize micro-and nano-processing in one-step. Here, we introduce and demonstrate the principles of some typical properties. The typical structures caused by interaction between laser and material are discussed. Moreover, laser-processing methods for biomimetic surface are highlighted to achieve specialized performance. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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confidence: 99%

Laser processing of micro/nano biomimetic structures

Xiao

Liu

et al. 2021

Micro & Nano Letters

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“…In recent years, laser surface texturing (LST) has proven to be a suitable tool for producing various surfaces with controllable topography, leading to improved surface properties, such as wettability [1,2] and self-cleaning [3], tribology [4] and antifouling properties [5]. Nowadays, out of the available LST methods, Direct Laser Interference Patterning (DLIP) has arisen as an innovative and effective tool for high throughput surface micro-structuring [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Utilizing a Diffractive Focus Beam Shaper to Enhance Pattern Uniformity and Process Throughput during Direct Laser Interference Patterning

El-Khoury

Voisiat

Kunze³

et al. 2022

Materials

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Uniform periodic microstructure formation over large areas is generally challenging in Direct Laser Interference Patterning (DLIP) due to the Gaussian laser beam intensity distribution inherent to most commercial laser sources. In this work, a diffractive fundamental beam-mode shaper (FBS) element is implemented in a four-beam DLIP optical setup to generate a square-shaped top-hat intensity distribution in the interference volume. The interference patterns produced by a standard configuration and the developed setup are measured and compared. In particular, the impact of both laser intensity distributions on process throughput as well as fill-factor is investigated by measuring the resulting microstructure height with height error over the structured surface. It is demonstrated that by utilizing top-hat-shaped interference patterns, it is possible to produce on average 44.8% deeper structures with up to 60% higher homogeneity at the same throughput. Moreover, the presented approach allows the production of microstructures with comparable height and homogeneity compared to the Gaussian intensity distribution with increased throughput of 53%.

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“…To further increase throughputs for the efficient use of high-power laser sources new fabrication methods have to be applied. These include polygon scanners providing scanning speeds above 100 m/s and multi-beam approaches 25 , 26 . Remarkable results were achieved by Schille 27 combining hybrid polygon scanning system with fast polygon axis, perpendicular galvo axis and beam splitting to 4 sub-beams reaching 1300 cm 2 /min for LIPSS production on 40 × 50 mm stainless steel sample.…”

Section: Introductionmentioning

confidence: 99%

LIPSS-based functional surfaces produced by multi-beam nanostructuring with 2601 beams and real-time thermal processes measurement

Hauschwitz

Martan

Bicistova

et al. 2021

Sci Rep

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A unique combination of the ultrashort high-energy pulsed laser system with exceptional beam quality and a novel Diffractive Optical Element (DOE) enables simultaneous production of 2601 spots organized in the square-shaped 1 × 1 mm matrix in less than 0.01 ms. By adjusting the laser and processing parameters each spot can contain Laser Induced Periodic Surface Structures (LIPSS, ripples), including high-spatial frequency LIPSS (HFSL) and low-spatial frequency LIPSS (LSFL). DOE placed before galvanometric scanner allows easy integration and stitching of the pattern over larger areas. In addition, the LIPSS formation was monitored for the first time using fast infrared radiometry for verification of real-time quality control possibilities. During the LIPSS fabrication, solidification plateaus were observed after each laser pulse, which enables process control by monitoring heat accumulation or plateau length using a new signal derivation approach. Analysis of solidification plateaus after each laser pulse enabled dynamic calibration of the measurement. Heat accumulation temperatures from 200 to 1000 °C were observed from measurement and compared to the theoretical model. The temperature measurements revealed interesting changes in the physics of the laser ablation process. Moreover, the highest throughput on the area of 40 × 40 mm reached 1910 cm2/min, which is the highest demonstrated throughput of LIPSS nanostructuring, to the best of our knowledge. Thus, showing great potential for the efficient production of LIPSS-based functional surfaces which can be used to improve surface mechanical, biological or optical properties.

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Large-Beam Picosecond Interference Patterning of Metallic Substrates

Cited by 14 publications

References 29 publications

Laser processing of micro/nano biomimetic structures

Laser processing of micro/nano biomimetic structures

Utilizing a Diffractive Focus Beam Shaper to Enhance Pattern Uniformity and Process Throughput during Direct Laser Interference Patterning

LIPSS-based functional surfaces produced by multi-beam nanostructuring with 2601 beams and real-time thermal processes measurement

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