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Thermal regime of laser ablation of metals by ultrashort pulses of low fluence

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Journal of Russian Laser Research Aims and scope

Abstract

Thermal ablation of a metal surface by low-energy ultrashort laser pulses is considered theoretically. The temporal dynamics of the surface electron and lattice temperatures is studied within the framework of the two-temperature model and for different temperature dependences of the characteristics of the metal (electron-relaxation time, heat capacity, thermal conductivity). The approximation of evaporation into a vacuum is used to determine the ablation depth. Analytical expressions for the ablation-threshold fluenceF th as well as the threshold values of the lattice temperatureT th (F th) and the characteristics time of lattice temperature decayt d (F th) are obtained. This analytical description is in satisfatory agreement with particular numerical calculations.

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Authors and Affiliations

  1. P. N. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii Pr. 53, 117924, Moscow, Russia

    Yu V. Afanasiev, B. N. Chichkov, V. A. Isakov, A. P. Kanavin & S. A. Uryupin

Authors
  1. Yu V. Afanasiev
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  2. B. N. Chichkov
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  3. V. A. Isakov
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  4. A. P. Kanavin
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  5. S. A. Uryupin
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Translated from a manuscript submitted September 3, 1998.

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Afanasiev, Y.V., Chichkov, B.N., Isakov, V.A. et al. Thermal regime of laser ablation of metals by ultrashort pulses of low fluence. J Russ Laser Res 20, 189–201 (1999). https://doi.org/10.1007/BF02508538

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