This article is cited in 1 paper

Interaction of laser radiation with matter. Laser plasma

Dynamics of surface processes in a transparent dielectric exposed to laser radiation

S. V. Vasil'ev, V. I. Nedolugov

Yanka Kupala State University of Grodno

Abstract: High-speed interference filming is used to study the dynamics of development of the change region of a surface vapour–plasma formation under the action of laser radiation with a power density up to 10⁷ W cm^-2 and a pulse duration of ~1 ms on polymethyl methacrylate samples of thickness up to 1 cm. Experiments show that damage region is mainly produced due to a thermal mechanism along with the possible effect of the emerging elastic vibrations. It is also shown that the damage takes place predominantly at the initial stages of the process (up to 100 μs) due to shielding of the sample by a vapour–plasma cloud and scattering of radiation from the liquid-drop phase.

PACS: 79.20.Ds, 52.38.-r

Received: 15.01.2007
Revised: 04.04.2007

 English version: Quantum Electronics, 2007, 37:11, 1047–1050

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