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Process optimization of Direct Laser Interference Patterning

Wednesday (24.06.2020)
13:31 - 13:34 Room 1
Part of:
- Poster Periodic microstructuring of metal moulds using direct laser interference patterning for nanoimprint replication 1 Dr. Marcos Soldera
- Poster Comparison of structural colors achieved by laser induced periodic surface structures and direct laser interference patterning 1 Dr. Marcos Soldera
- Poster *student* Wetting properties of the aluminium surface structures fabricated using Direct Laser Interference Patterning with picosecond and femtosecond pulses 1 Dipl.-Ing. Stephan Milles
- Poster The numerical realization of a model of interaction of ultrashort laser pulses with solid 1 Prof. Vladimir Zhukov
- Poster On the problem of the initial conditions for tightly-focused ultrashort laser pulses in the modeling of laser beam propagation in transparent solids 1 Prof. Vladimir Zhukov
- Poster Innovative polymer coating systems – applied by laser sintering technique 1 Dr. Anna Buling
- Poster Tangential laser turning of fused silica usin ultra-short laser pulses 1 Julian Zettl
- Poster Process optimization of Direct Laser Interference Patterning 1 Dr. Bogdan Voisiat
- Poster Dynamic aberration correction via spatial light modulator (SLM) for femtosecond direct laser writing 1 Gabrielius Kontenis
- Poster Modification of metal nanoparticles via femtosecond laser pulses and their application for SERS 1 Dr. Asta Tamuleviciene
- Poster Ultraviolet and Infrared Femtosecond Laser Irradiation of Thermoplastics PET and PA66 1 Dr. Xxx Sedao
- Poster High pulse energy femtosecond laser machining station for the interference and parallel processing 1 Dr. Simonas Indrisiunas
- Poster Laser material processing with a multi-beam setup based on Excited State Absorption 1 Sebastian Engel
- Poster GO-neutral red nanocomposite reduction by pulsed laser irradiation 1 Dr. Romualdas Trusovas
- Poster *student* Numerical simulation of energy relaxation in Mo thin films exposed to femtosecond laser pulse 1 Kryštof Hlinomaz
- Poster Modification of medical-grade poly(L-lactide) using femtosecond laser filamentation 1 Dr. Bogusz Stepak
Session Chair

Session PS: Poster Session 02
Belongs to:
Topic PS: Poster Session

Direct laser interference patterning (DLIP) has proven to be fast and, at the same time, a high-resolution method for the fabrication of large-area surface structures. However, in order to provide structures with adequate quality and defined morphology at the highest possible througput, the processing parameters have to be carefully selected. This involves the optimization of numerous process parameters, where the most relevant are the laser pulse energy, beam diameter, frequency, scan/translation speed, the distance between pulses (overlap), and the hatch-distance. Therefore, the development of a protocol powered by theoretical model is highly required to optimize these parameters.

This work introduces an analytical model to optimize the DLIP process parameters for achieving the maximal possible fabrication speed for a target structure depth and a mean laser power. The developed model permits to improve the process throughput by optimizing the laser spot diameter, as well as pulse energy and repetition rate. The developed model considers structures formed by a single scan of the beam in one direction. To validate the model, microstructures with a 5.5 µm spatial period were fabricated on stainless steel employing picosecond DLIP system (10 ps), using a laser source operating at a 1064 nm wavelength. The fabricated line-like periodic structures were characterized by scanning electron and confocal microscopy. The prediction of the analystical model showed a difference of only 10% compared to the experimental results.

Additional Authors:
  • Alfredo I. Aguilar-Morales
    Fraunhofer Institut für Werkstoff und Strahltechnik IWS
  • Dr. Tim Kunze
    Fraunhofer Institut für Werkstoff und Strahltechnik IWS
  • Prof. Dr. Andrés Fabián Lasagni
    Technische Universität Dresden


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Poster Extended abstract - Final This is the abstract for the poster 179 KB Download
Poster Poster - Final This is the poster for the poster session 2 930 KB Download