摘要
通过控制飞秒激光脉冲分别在线偏振和角向偏振条件下的入射脉冲个数,在金属钨材料表面获得了周期性亚波长条纹和金属纳米线复合而成的新型微纳米结构。实验结果表明,线偏振激光脉冲诱导形成亚波长表面条纹结构的周期和脊面宽度随脉冲个数的增加而减小;在两种不同偏振情况下,飞秒激光脉冲在样品表面诱导形成的金属纳米线结构随激光脉冲个数的增加逐渐趋于消失,而形成微纳米结构的区域面积随激光脉冲个数逐渐增加而增大,并在飞秒激光脉冲个数为150时趋于不变。
We report the fabrication of two-dimensional periodic composite micro- and nano-structures consisting of subwavelength ripples and nanowires on tungsten surface by adjusting femtosecond laser pulse number with either linear or azimuthal polarization in repetitive irradiation. The experiment results show that both the spatial periodicity and ridge width of the subwavelength ripples tend to decrease with the increase of the overlapped pulse number. Femtosecond laser pulses induced metallic nanowires on the sample surface gradually disappear when the overlapped pulse number of femtosecond laser with both polarization states increases. The structured area of the sample surface gradually increases with the increase of overlapped laser pulses number, but the obtained area appears to be saturated when the pulse number reaches up to 150.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第1期97-102,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(11274184)
天津市自然科学基金(12JCZDJC20200)
教育部博士点基金(20120031110032)
关键词
激光制造
二维周期复合结构
线偏振光
角向偏振光
金属钨
laser manufacturing
two-dimensional periodic composite structures
linearly polarized light
azimuthally polarized light
tungsten
