期刊
APPLIED PHYSICS LETTERS
卷 83, 期 15, 页码 3030-3032出版社
AMER INST PHYSICS
DOI: 10.1063/1.1619560
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We study the morphology of borosilicate glass surface machined by femtosecond laser pulses. Our observations show that a thin rim is formed around ablated craters after a single laser pulse. When multiple laser pulses are overlapped, the crater rims also overlap and produce a surface roughness. The rim appears to be a resolidified splash from a molten layer generated during the ablation process. We estimate that this molten layer is a few micrometers thick and exists for a few microseconds. During this melt lifetime, forces acting on the molten layer move it from the center to the edge of the crater. (C) 2003 American Institute of Physics.
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