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

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 10{sup 7} W cm{sup -2} and a pulse duration of {approx}1 ms on polymethyl methacrylate samples of thic...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2007-11, Vol.37 (11), p.1047-1050
Main Authors: Vasil'ev, S V, Nedolugov, V I
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CARBOXYLIC ACID SALTS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
DIELECTRIC MATERIALS
DIMENSIONS
ELECTROMAGNETIC RADIATION
Electron and ion emission by liquids and solids
impact phenomena
Exact sciences and technology
FLUIDS
Fundamental areas of phenomenology (including applications)
GASES
Impact phenomena (including electron spectra and sputtering)
INTERFERENCE
LASER RADIATION
Laser-beam impact phenomena
LIQUIDS
MATERIALS
METHACRYLATES
Optics
Physics
PLASMA PRODUCTION
POWER DENSITY
PULSES
RADIATION EFFECTS
Radiation effects on optical elements, devices, and systems
RADIATIONS
SCATTERING
SURFACES
THICKNESS
VAPORS
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Summary: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 10{sup 7} W cm{sup -2} and a pulse duration of {approx}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 {mu}s) due to shielding of the sample by a vapour-plasma cloud and scattering of radiation from the liquid-drop phase. (interaction of laser radiation with matter. laser plasma)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2007v037n11ABEH013521