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

仿生表面结构包含纳米/微米尺度的特征，为创建功能化表面提供了巨大的潜力。在这一目标中，表面改性技术而不是制造复合材料或在表面上涂覆涂层的技术可以提供新的机会(例如，长期稳定的表面和更环保的工艺)。特别是，激光表面毛化已被证明能够获得先进的功能，特别是当使用以纳秒(短)、皮秒和飞秒(超短)脉冲持续时间工作的源时。有了现有的最先进的技术，今天有可能产生具有先进功能但处理速度非常低的高分辨率表面图案。在这种背景下，为了确保不同衬底的高通量激光结构化工艺，需要一种高功率的超短脉冲激光系统。该激光系统将与不同的光束操纵系统相结合，从而能够制造高分辨率的复杂表面图案。以这种方式，将可能产生用于改进大量功能的有纹理的表面形貌。该系统还将用于在压花过程中使用的结构工具(例如，板到板的热压花)。此外，该系统还将与干涉光学相结合，允许一步产生多个尺度的表面纹理。

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.