High-power ultrashort pulsed laser for the efficient micro/nano structuring of surfaces

生物启发的表面结构，包含纳米/微米尺度的特征，为功能化表面的创建提供了巨大的潜力。在这一目标中，表面改性技术而不是在表面上制造复合材料或涂敷涂层可以提供新的机会（例如长期稳定的表面和更环保的工艺）。特别地，激光表面纹理化已经显示出能够获得先进的功能，特别是当使用以纳秒（短）和皮秒和飞秒（超短）的脉冲持续时间操作的源时。利用现有的最新技术，如今可以以非常低的处理速度生产具有高级功能的高分辨率表面图案。在这种情况下，为了确保不同基材的高通量激光成型工艺，需要高功率超短脉冲激光系统。该激光系统将与各种光束操纵系统相结合，从而能够制造具有高分辨率的复杂表面图案。以这种方式，将有可能产生用于改善大量功能的纹理化表面形貌。该系统还将用于压花工艺中使用的结构化工具（例如板对板热压花）。此外，该系统还将与干涉光学相结合，允许在一步过程中产生多尺度表面纹理。

Bio-inspired surface structures, containing features in the nanometre/micrometre scales, offer significant potential for the creation of functionalized surfaces. In this aim, technologies to modify surfaces instead of creating composites or spreading coatings on surfaces can offer new opportunities (e.g. long-term stable surfaces and more environmental friendly processes). In particular, laser surface texturing has shown to be capable obtaining advanced functionalities, especially when sources operating at pulse durations of nanosecond (short) and picosecond and femtosecond (ultrashort) are used. With the existing state-of-the-art, today it is possible to produce high-resolution surface patterns with advanced functionalities but at very low processing speeds. In this context, to ensure the high-throughput laser based structuring process of different substrates, a high-power ultrashort-pulse laser system is required. This laser system will be combined with diverse beam-manipulation systems enabling fabrication of complex surface patterns with high resolution. In this way, it will be possible to produce textured surface topographies for improving a large amount of functions. The system will also be used for structuring tools which are utilized in embossing processes (e.g. plate-to-plate hot embossing). In addition, the system will also be combined with interference optics, permitting to produce multiple-scale surface textures in a one-step process.