研究目的
Investigating the generation of 2D laser-induced structures on a stainless steel surface using double- and multi-femtosecond pulses produced by birefringent crystals.
研究成果
The study demonstrated the generation of homogeneous 2D-LIPSS over large areas using a simple array of birefringent crystals, validating the reproducibility of the double-pulse approach. The morphology of the structures was found to depend on the interplay between fluence, inter-pulse delay, and the number of incident pulses. The results pave the way for the industrial application of this surface structuring approach.
研究不足
The study is limited by the use of a specific type of stainless steel (304L) and the range of inter-pulse delays and fluences tested. The scalability of the process to other materials and larger areas requires further investigation.
1:Experimental Design and Method Selection:
The study employed a femtosecond laser delivering 200-fs pulses at 1030 nm, with double-pulses generated by birefringent crystals of different lengths to vary inter-pulse delays. The setup included a galvo scanner for surface texturing.
2:Sample Selection and Data Sources:
Commercially available, polished stainless steel samples (304L) of 0.5-mm thickness were used.
3:5-mm thickness were used.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A femtosecond laser (Pharos from Light Conversion), birefringent crystals (CaCO3), a galvo scanner (intelliSCAN 14 from SCANLAB), and a CMOS camera (FireWire BeamPro Model 2523, Photon Inc.) for spot size measurement.
4:Experimental Procedures and Operational Workflow:
The beam was guided through a sequence of birefringent crystals, with intensity regulated by a rotating half-waveplate and a polarizing cube. The surface was characterized using SEM and AFM.
5:Data Analysis Methods:
SEM images were analyzed with Fourier transform (FT) using Gwyddion software to extract structure dimensions.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容