Premium
Scanner‐Based Direct Laser Interference Patterning on Stainless Steel
Author(s) -
Madelung Aleksander,
Alamri Sabri,
Steege Tobias,
Krupop Benjamin,
Lasagni Andrés Fabián,
Kunze Tim
Publication year - 2021
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.202001414
Subject(s) - galvanometer , materials science , laser , scanner , optics , fluence , wavelength , interference (communication) , laser scanning , laser power scaling , fabrication , scan line , optoelectronics , computer science , physics , medicine , computer network , channel (broadcasting) , alternative medicine , pixel , pathology , grayscale
Direct laser interference patterning (DLIP) so far has been used almost exclusively in combination with mechanical translation stages reaching impressive throughputs for very specific configurations. As an alternative, DLIP modules can be combined with laser scanners, however presenting some limitations in comparison with standard static optical setups due to the limited possible spatial separation between the interfering beams. Herein, the fabrication of periodic microstructures on stainless steel using a galvanometer‐scanner DLIP approach is addressed. Line‐like patterns with spatial periods ranging from 2.9 to 12.8 μm are produced using a nanosecond pulsed laser source operating at a wavelength of 527 nm. The scan fields generated are evaluated with respect to the structure quality and scan field size, with dependence on the spatial period. Furthermore, the correlation between the spatial period, laser fluence, total number of pulses, and resulting structure depth of the line‐like patterns is discussed. In addition, the optimization of process parameters leads to surface patterns with aspect ratios greater than 1. The achievable structuring speeds are determined under consideration of the used number of pulses. Finally, throughputs up to 7.69 cm 2 min −1 with less than 0.5 W laser power at a repetition rate of 3.5 kHz are realized.