The goal of this study was to investigate a study for the efficient generation of pillar-like nanostructure (nanopillar) on a material surface over a large area. In this research, a vertical cross-scanning (VCS) strategy using two linearly-polarized lasers with different laser conditions was proposed for the generation of nanopillars on a mirror-polished surface on a large scale. It found that the laser fluence and scanning speed of the second laser scanning should be controlled within a specific range to generate the nanopillars. Additionally, the distance between scan lines, which is defined as hatch distance, h, of the second scan, is also a non-negligible factor to induce nanopillars to cover the entire surface. This work demonstrated that the VCS method is a feasible strategy for the fabrication of nanopillars on the entire mirror-polished surface of Ti6Al4V alloy by linearly-polarized picosecond laser conveniently and efficiently.

本研究的目的是调查在材料表面大面积有效生成柱状纳米结构（纳米柱）的研究。在这项研究中，提出了一种使用两个具有不同激光条件的线偏振激光器的垂直交叉扫描 (VCS) 策略，用于在镜面抛光的表面上大规模生成纳米柱。发现第二次激光扫描的激光能量密度和扫描速度应控制在特定范围内以生成纳米柱。此外，扫描线之间的距离，定义为影线距离，h，第二次扫描，也是一个不可忽略的因素，以诱导纳米柱覆盖整个表面。这项工作表明，VCS 方法是一种可行的策略，可以方便、高效地通过线偏振皮秒激光在 Ti6Al4V 合金的整个镜面抛光表面上制备纳米柱。