High period frequency LIPSS emerging on 304 stainless steel under the irradiation of femtosecond laser double-pulse trains  

作　　者：Yifei Li Jie Hu Wei Liu Jiangang Yin Jiangang Lu 李抑非;胡洁;刘威;尹建刚;卢建刚(Laser Micro/Nano Fabrication Laboratory,School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Han’s Laser Technology Industry Group Co.,Ltd.,Shenzhen 518126,China)

机构地区：[1]Laser Micro/Nano Fabrication Laboratory,School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Han’s Laser Technology Industry Group Co.,Ltd.,Shenzhen 518126,China

出　　处：《Chinese Optics Letters》2021年第12期156-163,共8页中国光学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2018YFB1107200);the National Natural Science Foundation of China(Nos.51675048 and 11704028)。

摘　　要：In this work,we used femtosecond laser double-pulse trains to produce laser-induced periodic surface structures(LIPSS)on 304 stainless steel.Surprisingly,a novel type of periodic structure was discovered,which,to the best of our knowledge,is the first in literature.We surmised that the cause for this novel LIPSS was related to the weak energy coupling of subpulses when the intrapulse delay was longer than the thermal relaxation time of stainless steel.Furthermore,we found that the fluence combination and arrival sequence of subpulses in a double-pulse train also influenced LIPSS morphology.

关 键 词：femtosecond laser laser-induced periodic surface structures morphology stainless steel 

分 类 号：TN249[电子电信—物理电子学] TG142.71[一般工业技术—材料科学与工程]