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Femtosecond laser ablation of a thin silver film in air and water

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Abstract

In this work, single-shot craters were produced by femtosecond laser ablation using an objective with a numerical aperture NA = 0.25 and laser pulses with the 0.3-ps width and the central wavelength of 515 nm. Ablation was performed in air and distilled water. A sample, 65-nm thick silver film, was prepared by magnetron sputtering onto silica glass and crystalline silicon substrates. Craters were visualized by a scanning electron microscope. Some differences were found in the morphology of craters, depending on the substrate and on the ambient medium. A drastic increase in the crater size was observed during the ablation in water, which is explained by filamentation that occurs when the peak pulse power exceeds 1.3 MW.

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Acknowledgements

This research was supported by the Russian Science Foundation (Grant No. 16-12-10165).

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Correspondence to N. A. Smirnov.

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This article is part of the Topical Collection on Advanced Photonics Meets Machine Learning.

Guest edited by Goran Gligorić, Jelena Radovanovic and Aleksandra Maluckov.

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Smirnov, N.A., Kudryashov, S.I., Danilov, P.A. et al. Femtosecond laser ablation of a thin silver film in air and water. Opt Quant Electron 52, 71 (2020). https://doi.org/10.1007/s11082-019-2169-1

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  • DOI: https://doi.org/10.1007/s11082-019-2169-1

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