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

2017 ◽  
Vol 417 ◽  
pp. 88-92 ◽  
Author(s):  
Stella Maragkaki ◽  
Thibault J.-Y. Derrien ◽  
Yoann Levy ◽  
Nadezhda M. Bulgakova ◽  
Andreas Ostendorf ◽  
...  
Keyword(s):  
Picosecond Laser ◽  
Wavelength Dependence ◽  
Surface Structures ◽  
Periodic Surface

Periodic surface structures on the surface of indium tin oxide film obtained using picosecond laser

2018 ◽  
Vol 106 ◽  
pp. 259-264 ◽  
Author(s):  
Peng Liu ◽  
Wenjun Wang ◽  
Aifei Pan ◽  
Yang Xiang ◽  
Dapeng Wang
Keyword(s):  
Oxide Film ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Picosecond Laser ◽  
Surface Structures ◽  
Periodic Surface

scholarly journals Picosecond Laser Interference Patterning of Periodical Micro-Architectures on Metallic Molds for Hot Embossing

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3409 ◽  
Author(s):  
Yangxi Fu ◽  
Marcos Soldera ◽  
Wei Wang ◽  
Bogdan Voisiat ◽  
Andrés Fabián Lasagni
Keyword(s):  
Picosecond Laser ◽  
Processing Parameters ◽  
Hot Embossing ◽  
Surface Structures ◽  
Laser Source ◽  
Laser Interference ◽  
Periodic Surface ◽  
Direct Laser ◽  
Direct Laser Interference Patterning ◽  
532 Nm

In this work, it is demonstrated that direct laser interference patterning (DLIP) is a method capable of producing microtextured metallic molds for hot embossing processes. Three different metals (Cr, Ni, and Cu), relevant for the mold production used in nanoimprinting systems, are patterned by DLIP using a picosecond laser source emitting at a 532 nm wavelength. The results show that the quality and surface topography of the produced hole-like micropatterns are determined by the laser processing parameters, such as irradiated energy density and the number of pulses. Laser-induced periodic surface structures (LIPSS) are also observed on the treated surfaces, whose shapes, periodicities, and orientations are strongly dependent on the accumulated fluence. Finally, the three structured metals are used as embossing molds to imprint microlenses on polymethyl methacrylate (PMMA) foils using an electrohydraulic press. Topographical profiles demonstrate that the obtained structures are comparable to the masters showing a satisfactory reproduction of the texture. The polymeric microlens arrays that showed the best surface homogeneity and overall quality were those embossed with the Cr molds.

Control of short-pulsed laser induced periodic surface structures with machining - Picosecond laser micro/nanotexturing with ultraprecision cutting

2019 ◽  
Vol 55 ◽  
pp. 433-438 ◽  
Author(s):  
Shuhei Kodama ◽  
Shinya Suzuki ◽  
Kazuya Hayashibe ◽  
Keita Shimada ◽  
Masayoshi Mizutani ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Picosecond Laser ◽  
Surface Structures ◽  
Periodic Surface

Picosecond laser induced periodic surface structures on K9 glass

2021 ◽  
Vol 23 ◽  
pp. 101026
Author(s):  
Cai-Yun Yu ◽  
Yu-Fan Gao ◽  
Bing Han ◽  
Martin Ehrhardt ◽  
Pierre Lorenz ◽  
...  
Keyword(s):  
Picosecond Laser ◽  
Surface Structures ◽  
Periodic Surface ◽  
K9 Glass

scholarly journals Effects of Electrolyte on Laser-Induced Periodic Surface Structures with Picosecond Laser Pulses

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 327
Author(s):  
Shuhei Kodama ◽  
Wataru Natsu
Keyword(s):  
Surface Composition ◽  
Nitrate Solution ◽  
Electrochemical Machining ◽  
Pulsed Laser ◽  
Picosecond Laser ◽  
Surface Structures ◽  
304 Stainless Steel ◽  
Control Surface ◽  
Copper Sulfate Solution ◽  
Periodic Surface

Short-pulsed laser-induced periodic surface structures (SPLIPSSs) have the possibility to control tribology, wettability and biocompatibility. Nevertheless, the optimal structure depends on each functionality, which has not been clarified. The hybrid process with a short-pulsed laser and electrochemical machining (SPLECM) is, then, proposed to fabricate micro/nano hybrid structures and to modify the surface composition for providing high functionalities with material surfaces. Electrochemical machining is a well-established micro-elution and deposition method with noncontact between a workpiece and a tool. In this study, the effects of electrolytes on SPLIPSSs were investigated experimentally by the picosecond laser irradiation on 304 stainless steel substrates in various electrolytes. The geometry of SPLIPSSs depended on the types and the concentration of electrolytes. In the case of copper nitrate solution and copper sulfate solution, LIPSSs and spheroidization of copper were obtained. This study demonstrated the possibility of SPLECM to fabricate micro/nano structures and to control surface composition.

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