In order to discuss the possibility of manufacturing controllable nanostructures induced by femtosecond laser, orientation-controllable nanogratings were firstly prepared on bulk Ag target by femtosecond pulsed laser whose linear polarization angle was adjusted continuously by two inserted half-wave plates. Then, based on energy accumulation effect and the dependence of the orientation of self-organized nanogratings on laser polarization angle obtained from the experiments, it was discussed how to controllably induce 2-D periodic nanostructures on target surfaces by femtosecond laser. In addition, combining the laser scanning approach with multi-beam alternative ablations method, large-area and high-uniformity nanostructures with tunable nanounits are expected to be manufactured. The result is expected to open a new approach of inducing 2-D periodic nanostructures with tunable nanounits and to offer some important clues for controllably manufacturing periodic nanostructures on target surfaces by ultrashort pulsed laser.%为了研究激光诱导可控自组织周期纳米结构的可能性,采用半波片连续改变入射线偏振激光的电矢量方向,在金属Ag块靶上制备了取向可控的自组织纳米光栅结构,并基于能量累积效应和数值拟合的诱导自组织纳米光栅结构取向与激光线偏振角度间的依赖关系,对在靶材表面实现任意2维自组织周期纳米结构的可能性进行了讨论.结果表明,结合激光动态交替扫描法,这种自组织周期纳米结构单元在靶材表面上大面积、高规整度地制备有望实现.研究结果为激光诱导任意2维周期纳米结构打开了新思路,也为这种周期纳米结构的可控制备提供重要的理论线索.
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