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On a New Method of Acoustic Monitoring of the Nanosecond Laser Ablation of Metals

  • Optics and Laser Physics
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Abstract

The possibility of acoustic detection of submicron displacement of a metal surface during ablation induced by a nanosecond (∼550 ns) train of ∼70 short (∼60 ps) laser pulses has been demonstrated experimentally for the first time. The detection is based on the comparison of time structures of modulation of the laser intensity and recoil pressure in an irradiated target observed by a piezoelectric sensor. The displacement at low intensities of irradiation is due to thermal expansion. With an increase in the intensity, the displacement changes sign because of the development of ablation processes in the irradiated region. The proposed method makes it possible to obtain new information on the behavior of a material, in particular, under the conditions of extreme phase nonequilibrium under intense laser irradiation.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia

    A. A. Samokhin, E. V. Shashkov, N. S. Vorob’ev & A. E. Zubko

Authors
  1. A. A. Samokhin
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  2. E. V. Shashkov
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  3. N. S. Vorob’ev
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  4. A. E. Zubko
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Corresponding author

Correspondence to A. E. Zubko.

Additional information

Original Russian Text © A.A. Samokhin, E.V. Shashkov, N.S. Vorob’ev, A.E. Zubko, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 108, No. 6, pp. 388–392.

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Samokhin, A.A., Shashkov, E.V., Vorob’ev, N.S. et al. On a New Method of Acoustic Monitoring of the Nanosecond Laser Ablation of Metals. Jetp Lett. 108, 364–367 (2018). https://doi.org/10.1134/S0021364018180108

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  • DOI: https://doi.org/10.1134/S0021364018180108

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