Comparison of Structure and Properties of Femtosecond and Nanosecond Laser-Structured Silicon
By C. H. Crouch, J. Carey, J. Warrender, M. Aziz, E. Mazur, F. Génin. 2004
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We compare the optical properties, chemical composition, and crystallinity of silicon microstructures formed in the presence of SF6 by femtosecond laser irradiation and by nanosecond laser irradiation. In spite of very different morphology and crystallinity, the optical properties and chemical composition of the two types of microstructures are very similar. The structures formed with femtosecond (fs) pulses are covered with a disordered nanocrystalline surface layer less than 1 μm thick, while those formed with nanosecond (ns) pulses have very little disorder. Both ns-laser-formed and fs-laser-formed structures absorb near-infrared (1.1–2.5 μm) radiation strongly and have roughly 0.5% sulfur impurities.
Subfields: Biomedical Engineering, Computational Mechanics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/7a4ba2c9064add5ce7db174e8cb606a53959b06f
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Citations in the corpus
- Structural absorption by barbule microstructures of super black bird of paradise feathers (2018, background): “Each time light scatters at a surface interface, a proportion of that light is transmitted into the material, where it can be absorbed 9 .”
- Ultrafast laser processing of materials: a review (2015, neutral): “Due to the slower resolidification-front velocity, no polycrystalline layer is observed on the surface [50].”