摘要
This paper investigates the generation of self-organized surface structures on amorphous alloys by vortex femtosecond laser pulses. The scanning electron microscope characterizations show that the as-formed structures are periodic ripples, aperiodic ripples, and ‘coral-like＇ structures. Optimal conditions for forming these surface structures are determined in terms of pulses number at a given pulse energy. The applicable mechanism is suggested to interpret the formation and evolution of the ＇coral-like＇ structures.
This paper investigates the generation of self-organized surface structures on amorphous alloys by vortex femtosecond laser pulses. The scanning electron microscope characterizations show that the as-formed structures are periodic ripples, aperiodic ripples, and ‘coral-like＇ structures. Optimal conditions for forming these surface structures are determined in terms of pulses number at a given pulse energy. The applicable mechanism is suggested to interpret the formation and evolution of the ＇coral-like＇ structures.
基金
Project supported by the Science and Technology Key Program of Shandong Province,China (Grant No. 2008GG10004020)
China Postdoctoral Science Foundation (Grant No. AUGA41001348)
Heilongjiang Province Postdoctoral Science Foundation(Grant No. AUGA1100074)
the Program of Excellent Team in the Harbin Institute of Technology,China
