Pulsed femtosecond laser system

表面及其相互作用和它们的环境是非常复杂的。理解它们一直是并将继续是自然科学的最大挑战之一。表面的许多功能特性，例如摩擦行为、生物功能性、电接触电阻和抗微生物特性，可以通过表面的靶向化学和形貌改性在宽范围内调节。这里应用的飞秒脉冲激光系统将主要用于表面的功能化。DLIP（直接激光干涉图案化）技术将用于产生周期性表面结构，该技术在主申请人的小组中已经得到显著发展。计划的研究领域包括细菌和病毒与表面的相互作用以及摩擦优化结构的生成。所申请的设备旨在取代现有的系统，近年来在许多项目（德国航天局、德国航空航天中心/欧空局、美国航天局）中利用该系统进行了广泛的研究。材料科学和生物物理学之间进行的跨学科研究有助于萨尔兰大学的主要焦点NanoBioMed。 在（表面）材料加工中，飞秒激光器特别令人感兴趣。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在（亚）微米尺度上烧蚀材料。因此，该激光器也非常适合第二个计划的应用领域，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，例如生产用于小规模机械实验的微弯曲梁。由于年代久远，到目前为止使用的飞秒激光系统已不再提供所有相关备件，将被带附件的更现代化系统所取代。为了充分利用技术潜力，需要最先进的设备。新的激光系统与现代化的设备相结合，大大加强和扩大了相关工作组的研究能力，这些研究能力可以跨主题进行映射，对于进一步扩大萨尔布吕肯校区国际顶级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.