Pulsed femtosecond laser system

表面及其相互作用和它们所处的环境是极其复杂的。理解它们一直是并将继续是自然科学的巨大挑战之一。通过对表面进行有针对性的化学和表面改性，可以在很大范围内调节表面的许多功能特性，如摩擦行为、生物功能性、电接触电阻和抗菌性能。应用于此的飞秒脉冲激光系统将主要服务于表面的这种功能化。DLIP(直接激光干涉图案化)技术将被用来产生周期性表面结构，该技术已经在主要申请者组中得到了显著的发展。计划中的研究领域包括细菌和病毒与表面的相互作用以及产生摩擦优化结构。申请的设备旨在取代现有的系统，近年来在许多项目(DFG、DLR/ESA、NASA)中利用该系统进行了广泛的研究。在材料科学和生物物理学之间进行的跨学科研究是萨尔兰大学纳米生物医学的主要重点。在(表面)材料加工中，飞秒激光特别令人感兴趣。由于与物质相互作用的性质，这种类型的激光通过超短脉冲将对样品的热影响降至最低，同时以高边缘和细节锐度烧蚀(亚)微米级的材料。因此，该激光器还非常适合计划中的第二个应用领域，即直接激光写入(DLW)，用于有针对性地生产定义的样品几何形状，例如，为小规模的机械实验生产微弯曲光束。由于年代久远，到目前为止使用的飞秒激光系统，但不再提供所有相关的备件，将被带有附件的更现代的系统所取代。为了充分发挥技术潜力，需要最先进的设备。与现代化设备相结合，新的激光系统显著加强和扩大了有关工作组的研究能力，这些能力可以跨主题绘制，对于萨尔布吕肯校区进一步扩大国际一流水平的基础研究至关重要。

Surfaces and their interactions with each other and their environment are of enormous complexity. Understanding them has been and will remain one of the great challenges of the natural sciences. Numerous functional properties of surfaces, such as frictional behavior, biofunctionality, electrical contact resistance, and antimicrobial properties, can be tuned in a wide range by targeted chemical and topographical modification of surfaces. The femtosecond pulse laser system applied for here will mainly serve this functionalization of surfaces. The DLIP (Direct Laser Interference Patterning) technique, which has been significantly developed in the group of the main applicant, will be used to generate periodic surface structures. The planned research areas include the interaction of bacteria and viruses with surfaces and the generation of friction-optimized structures. The equipment applied for is intended to replace an existing system with which extensive research has been carried out in numerous projects (DFG, DLR/ESA, NASA) in recent years. The interdisciplinary research carried out between materials science and biophysics contributes to the main focus NanoBioMed of Saarland University. In (surface) materials processing, femtosecond lasers are of particular interest. Due to the nature of the interaction with matter, this type of laser minimizes the thermal influence on the sample to a minimum through ultrashort pulses while simultaneously ablating material on the (sub-)micrometer scale with high edge and detail sharpness. This laser is thus also ideally suited for the second planned field of application, direct laser writing (DLW) for the targeted production of defined sample geometries, e.g. the production of micro bending beams for mechanical experiments on a small scale. Due to its age, the femtosecond laser system used so far, but no longer supplied with all relevant spare parts, is to be replaced by a more modern system with accessories. In order to exploit the full technical potential, state-of-the-art equipment is requested. In combination with the modernized equipment, the new laser system significantly strengthens and expands the research competence of the involved working groups, which can be mapped across topics and is essential for the further expansion of basic research at a top international level at the Saarbrücken Campus.