Analysis of Irradiation Processes for Laser-Induced Periodic Surface Structures

Eichstädt, J.; Veld, A.J. Huis in ’t

doi:10.1016/j.phpro.2013.03.129

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…The qualitative topography analysis of the DLIP treated planar Ni‐substrates (section 2.2) revealed not only the characteristic surface spatial period Λ 1 corresponding to the interference pattern, but also two other repetitive distances Λ 2 and Λ 3 , parallel and perpendicular to the laser light polarization, respectively. The last two observed periodic patterns with dimensions smaller than the used laser wavelength can be explained by the formation of laser induced periodic surface structures (LIPSS) at the positions corresponding to the interference maxima …”

Section: Discussionmentioning

confidence: 99%

Large Area One‐Step Fabrication of Three‐Level Multiple‐Scaled Micro and Nanostructured Nickel Sleeves for Roll‐to‐Roll Hot Embossing

2017

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Direct laser interference patterning enabled the fabrication of three level multiple-scaled microstructures on nickel surfaces using infrared picosecond laser pulses. While the largest spatial period (1.5 to 5.7 mm) could be controlled by adjusting the angle between the interfering laser beams and the laser wavelength, low and high spatial frequency laser induced periodic surface structures with pitches of approximately 800 nm and 160 nm, respectively, were also observed. Using a set of optimized processing parameters, large area Ni-sleeves were treated. These sleeves were later employed in preliminarily investigations of roll-to-roll high throughput hot-embossing of polymer foils.

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Section: Discussionmentioning

confidence: 99%

Large Area One‐Step Fabrication of Three‐Level Multiple‐Scaled Micro and Nanostructured Nickel Sleeves for Roll‐to‐Roll Hot Embossing

2017

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“…The overlap ratio of 0.91 between successive laser pulses and successive scan tracks was kept constant for all of the experiments. This relatively high overlap ratio was intended for a homogeneous energy deposition [13]. The laser fluence quoted in this paper is the peak fluence F = 2 ε /π ω 0 2 , with ε being the laser pulse energy.…”

Section: Methodsmentioning

confidence: 99%

Additive and Substractive Surface Structuring by Femtosecond Laser Induced Material Ejection and Redistribution

et al. 2018

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A novel additive surface structuring process is devised, which involves localized, intense femtosecond laser irradiation. The irradiation induces a phase explosion of the material being irradiated, and a subsequent ejection of the ablative species that are used as additive building blocks. The ejected species are deposited and accumulated in the vicinity of the ablation site. This redistribution of the material can be repeated and controlled by raster scanning and multiple pulse irradiation. The deposition and accumulation cause the formation of µm-scale three-dimensional structures that surpass the initial surface level. The above-mentioned ablation, deposition, and accumulation all together constitute the proposed additive surface structuring process. In addition, the geometry of the three-dimensional structures can be further modified, if desirable, by a subsequent substractive ablation process. Microstructural analysis reveals a quasi-seamless conjugation between the surface where the structures grow and the structures additively grown by this method, and hence indicates the mechanic robustness of these structures. As a proof of concept, a sub-mm sized re-entrant structure and pillars are fabricated on aluminum substrate by this method. Single units as well as arrayed structures with arbitrary pattern lattice geometry are easily implemented in this additive surface structuring scheme. Engineered surface with desired functionalities can be realized by using this means, i.e., a surface with arrayed pillars being rendered with superhydrophobicity.

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Analysis of Irradiation Processes for Laser-Induced Periodic Surface Structures

Cited by 2 publications

References 19 publications

Large Area One‐Step Fabrication of Three‐Level Multiple‐Scaled Micro and Nanostructured Nickel Sleeves for Roll‐to‐Roll Hot Embossing

Large Area One‐Step Fabrication of Three‐Level Multiple‐Scaled Micro and Nanostructured Nickel Sleeves for Roll‐to‐Roll Hot Embossing

Additive and Substractive Surface Structuring by Femtosecond Laser Induced Material Ejection and Redistribution

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