We report on comparative studies of the optical vortex-induced structures of both Si(100) and Si(111) by irradiation with a single optical vortex picosecond pulse. Furthermore, we address the effects of the total angular momentum (TAM) on the optical vortex-induced microneedle. Si(111) allows for the faster growth of the microneedle, although this impacts the monocrystallization of the needle. The TAM then forces the melted silicon to spin axially, thereby yielding an efficient accumulation of melted silicon on the substrate for microneedle formation. These results provide new fundamental insights into the interactions between optical vortex fields and irradiated materials.

中文翻译：

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皮秒光学涡旋脉冲辐照对Si（111）的微针结构

我们报告了通过单个光学涡旋皮秒脉冲辐照对Si（100）和Si（111）的光学涡旋诱导结构的比较研究。此外，我们解决了总角动量（TAM）对光学涡旋诱导的微针的影响。Si（111）允许微针的更快生长，尽管这会影响针的单晶化。然后，TAM迫使熔化的硅轴向旋转，从而使熔化的硅有效积聚在基板上以形成微针。这些结果为光学旋涡场与被辐照材料之间的相互作用提供了新的基本见解。