Adjustable annular rings of periodic surface structures induced by spatially shaped femtosecond laser
Adjustable annular rings of periodic surface structures induced by spatially shaped femtosecond laser
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DOI：
10.1088/1612-2011/12/5/056001
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发表时间：
2015-03
影响因子：
1.7
通讯作者：
Cong Wang;Z. Luo;Ji’an Duan;Lan Jiang;Xiao-yan Sun;Youwang Hu;Jianying Zhou;Y. Lu
中科院分区：
文献类型：
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作者：
Cong Wang;Z. Luo;Ji’an Duan;Lan Jiang;Xiao-yan Sun;Youwang Hu;Jianying Zhou;Y. Lu
在这项研究中，我们提出了一种利用轴棱镜制作周期性表面结构来将飞秒激光高斯光束调制成环形光束的有利方法。在不需要平移工作台复杂运动的情况下，一次光照即可制备出周期约为600~750 nm的均匀取向周期性表面结构的可调环形环。通过改变激光束的电矢量，可以控制所制备的周期性表面结构的取向。此外，通过调整样品和显微镜物镜之间的距离，可以在不改变光学元件和重新对准光路的情况下，在很大范围内灵活地控制所制造的环形环的直径。
In this study, we propose a favorable method to modulate femtosecond laser Gaussian beams into annular beams by using an axicon for the fabrication of periodic surface structures. Adjustable annular rings of uniform oriented periodic surface structures with a period of approximately 600~750 nm are fabricated in one illumination step without complicated movements of the translation stage. The orientations of the fabricated periodic surface structures are controllable by changing the electric vector of the laser beam. In addition, by adjusting the distance between the sample and microscope objective, the diameters of the fabricated annular rings can be flexibly controlled in a wide range without changing the optical elements and realignment of the optical path.