Temporal femtosecond pulse shaping dependence of laser-induced periodic surface structures in fused silica

The dependence of periodic structures and ablated areas on temporal pulse shaping is studied upon irradiation of fused silica by femtosecond laser triple-pulse trains. Three types of periodic structures can be obtained by using pulse trains with designed pulse delays, in which the three-dimensional...

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Bibliographic Details
Published in:Journal of applied physics 2014-07, Vol.116 (3)
Main Authors: Shi, Xuesong, Jiang, Lan, Li, Xin, Zhang, Kaihu, Yu, Dong, Yu, Yanwu, Lu, Yongfeng
Format: Article
Language:English
Subjects:
Ablation
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Dependence
ELECTRONS
Femtosecond pulses
Fused silica
IRRADIATION
LASER RADIATION
Material properties
Periodic structures
PERIODICITY
PULSES
Ripples
SILICA
Silicon dioxide
SURFACES
THREE-DIMENSIONAL CALCULATIONS
TRANSIENTS
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Summary:The dependence of periodic structures and ablated areas on temporal pulse shaping is studied upon irradiation of fused silica by femtosecond laser triple-pulse trains. Three types of periodic structures can be obtained by using pulse trains with designed pulse delays, in which the three-dimensional nanopillar arrays with ∼100–150 nm diameters and ∼200 nm heights are first fabricated in one step. These nanopillars arise from the break of the ridges of ripples in the upper portion, which is caused by the split of orthogonal ripples in the bottom part. The localized transient electron dynamics and corresponding material properties are considered for the morphological observations.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4890518