Surface mico-structures on amorphous alloys induced by vortex femtosecond laser pulses |
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Authors: | Ran Ling-Ling Qu Shi-Liang and Guo Zhong-Yi |
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Institution: | Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, China; Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | 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. |
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Keywords: | femtosencond laser pulse vortex ripple `coral-like'
structures |
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