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，为功能化表面的创造提供了巨大的潜力。为了实现这一目标，修改表面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，激光表面纹理已经显示出能够获得先进的功能，特别是当使用脉冲持续时间为纳秒（短）、皮秒和飞秒（超短）的光源时。利用现有的先进技术，今天可以生产具有先进功能的高分辨率表面图案，但处理速度非常低。在这种情况下，为了保证不同基材的高通量激光结构工艺，需要高功率超短脉冲激光系统。该激光系统将与多种光束操纵系统相结合，使制造具有高分辨率的复杂表面图案成为可能。通过这种方式，将有可能产生纹理表面形貌，以改善大量功能。该系统还将用于在压花过程中使用的结构工具（例如板对板热压花）。此外，该系统还将与干涉光学相结合，允许在一步工艺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.