Femtosecond-laser-induced nanostructure formed on nitrided stainless steel
Femtosecond-laser-induced nanostructure formed on nitrided stainless steel
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DOI：
10.1016/j.apsusc.2012.10.076
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发表时间：
2013
影响因子：
6.7
通讯作者：
N. Yasumaru;E. Sentoku;K. Miyazaki;J. Kiuchi
中科院分区：
文献类型：
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作者：
N. Yasumaru;E. Sentoku;K. Miyazaki;J. Kiuchi
研究了飞秒激光脉冲在氮化不锈钢表面形成的周期性表面纳米结构，并与未经处理的表面进行了比较。纳米结构在垂直于激光偏振的方向上形成，并且纳米结构中的平均间距D的变化被检查为激光能量密度F和fs激光脉冲的发射次数N的函数。在烧蚀阈值附近的F处观察到的D的最小值为250 nm，其对应于约1/3的激光波长λ，并且D随着F的增加而增加。观察到氮化表面上的辐照区域膨胀的特征现象。氮化表面在宽面积上形成的D尺寸比未处理表面小10-20%。
Periodic surface nanostructures formed on nitrided stainless steel with femtosecond (fs) laser pulses were investigated and compared with those of an untreated surface. The nanostructures are formed in the direction perpendicular to the laser polarization, and the variation of the mean spacing D in the nanostructures was examined as a function of the laser fluence F and the shot number N of fs laser pulses. The minimum value of D observed at F around the ablation threshold was 250nm, which corresponds to approximately 1/3 of the laser wavelength λ, and D increased with increasing F. The characteristic phenomenon where an irradiated area on the nitrided surface swells was observed. The size of D formed over a broad area for the nitrided surface was 10–20% smaller than that for the untreated surface.