This study concludes the possibility of controlling the period of the laser-induced periodic surface structures (LIPSSs) by deposition of a layer of different kinds of material on the processing sample. When the Pt-Pd or ZnO layers were deposited on the sapphire substrate, the period of the LIPSS formed at the sapphire surface was significantly shortened. For deposition layers thicker than 40 nm, LIPSS with periods much shorter than 330 nm, which is the period of LIPSS without a deposition layer, were formed. Some case periods of around 50 nm were obtained, which were one twentieth of the applied wavelength.

中文翻译：

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通过蓝宝石衬底上的薄沉积层控制激光诱导的周期性纳米结构的周期性

这项研究得出结论，可以通过在处理样品上沉积一层不同种类的材料来控制激光诱导的周期性表面结构（LIPSSs）的周期。当在蓝宝石衬底上沉积Pt-Pd或ZnO层时，在蓝宝石表面上形成的LIPSS的周期显着缩短。对于厚于40nm的沉积层，形成周期远小于330nm的LIPSS，这是没有沉积层的LIPSS的周期。获得了大约50 nm的某些情况下的周期，这是所施加波长的二十分之一。