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Abstract <p>The long (multimicrosecond) delay of irradiated material ejection after exposure of metals to an intense subnanosecond pulse during laser ablation observed in 2003 is experimentally investigated. However, though afterward mentioned many times, this result has never been repeated, and its initial explanation is still unsatisfactory. In this work, the long delays in ejection of a material under exposure of metal targets (aluminum, copper, lead) to a laser pulse with the duration of 70 ps, wavelength of 0.527 µm, and intensity <i>I</i> ≈ 10<sup>13</sup>&#xa0;W/cm<sup>2</sup> are confirmed using the two-beam time-of-flight method. It is stressed that the explanation of this effect based on the notion of a delayed phase explosion alone is insufficient and that cavitation phenomena subsequently arising in the melt layer should be taken into account.</p>

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On the Delay Effect in Pulsed Laser Ablation

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • I. A. Stuchebryukhov,
  • A. A. Samokhin,
  • P. A. Pivovarov,
  • S. A. Abrosimov

摘要

Abstract

The long (multimicrosecond) delay of irradiated material ejection after exposure of metals to an intense subnanosecond pulse during laser ablation observed in 2003 is experimentally investigated. However, though afterward mentioned many times, this result has never been repeated, and its initial explanation is still unsatisfactory. In this work, the long delays in ejection of a material under exposure of metal targets (aluminum, copper, lead) to a laser pulse with the duration of 70 ps, wavelength of 0.527 µm, and intensity I ≈ 1013 W/cm2 are confirmed using the two-beam time-of-flight method. It is stressed that the explanation of this effect based on the notion of a delayed phase explosion alone is insufficient and that cavitation phenomena subsequently arising in the melt layer should be taken into account.