基于柱面矢量飞秒laser光束的仿生表面结构
Biomimetic surface structuring using cylindrical vector femtosecond laser beams
摘要：
我们报告了一种新的，单步和可扩展的方法来制造高度有序，多方向和复杂的表面结构，模仿自然界中发现的某些物种的独特形态特征。利用柱面矢量飞秒激光束独特的角度分布和电场对称性，实现了仿生表面结构化。结果表明，高度可控的，周期性的结构表现出在纳米，微米和双尺度的微米和纳米尺度的尺寸可以直接写在Ni上的线和大面积扫描与径向和方位角偏振光束。根据照射条件，可以获得新的复杂的多方向纳米结构，灵感来自鲨鱼皮肤形态，以及模仿荷叶防水性能的超疏水双尺度结构。得出的结论是，与CV光束扫描后形成的结构的通用性和功能变化是远远优于那些通过激光加工与线偏振光束。更重要的是，通过利用fs CV光场提供的能力，本技术可以进一步扩展到制造更复杂和非常规的结构。我们相信，我们的方法为材料的激光加工提供了一个新的概念，可以进一步利用它来扩大潜在应用的广度和新颖性。
英文摘要：
We report on a new, single-step and scalable method to fabricate highly ordered, multi-directional and complex surface structures that mimic the unique morphological features of certain species found in nature. Biomimetic surface structuring was realized by exploiting the unique and versatile angular profile and the electric field symmetry of cylindrical vector (CV) femtosecond (fs) laser beams. It is shown that, highly controllable, periodic structures exhibiting sizes at nano-, micro- and dual-scale micro and nano scales can be directly written on Ni upon line and large area scanning with radial and azimuthal polarization beams. Depending on the irradiation conditions, new complex multi-directional nanostructures, inspired by the Shark skin morphology, as well as superhydrophobic dual-scale structures mimicking the Lotus leaf water repellent properties can be attained. It is concluded that the versatility and features variations of structures formed upon scanning with CV beams is by far superior to those obtained via laser processing with linearly polarized beams. More important, by exploiting the capabilities offered by fs CV optical fields, the present technique can be further extended to fabricate even more complex and unconventional structures. We believe that our approach provides a new concept in laser processing of materials, which can be further exploited for expanding the breadth and novelty of potential applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
