Laser-induced ultrafast phase transitions in solids using optical anisotropy

Michail B. Agranat; Sergei I. Anisimov; Sergei I. Ashitkov; Vladimir E. Fortov; Alexander V. Kirillin; Petr S. Kondratenko; Alexander V. Kostanovskii

doi:10.1117/12.321516

14 September 1998 Laser-induced ultrafast phase transitions in solids using optical anisotropy

Michail B. Agranat, Sergei I. Anisimov, Sergei I. Ashitkov, Vladimir E. Fortov, Alexander V. Kirillin, Petr S. Kondratenko, Alexander V. Kostanovskii

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Proceedings Volume 3343, High-Power Laser Ablation; (1998) https://doi.org/10.1117/12.321516
Event: High-Power Laser Ablation, 1998, Santa Fe, NM, United States

Abstract

A new method of crystalline order detection in highly absorbing anisotropic crystals is worked out. The method is based on partial transformation of incident p-polarized electromagnetic wave into s-polarized reflected wave due to optical anisotropy. The method makes possible to follow changes of crystalline structure in thin (10^-6 - 10^-5 cm) surface layers of solids. Using picosecond laser pulses and streak camera 'Agat,' surface melting and evaporation of Zn and C (graphite) are studied. Direct observation of the melting of graphite subjected to picosecond laser pulse is performed. The kinetics of solidification of fused surface layers are studied.

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Michail B. Agranat, Sergei I. Anisimov, Sergei I. Ashitkov, Vladimir E. Fortov, Alexander V. Kirillin, Petr S. Kondratenko, and Alexander V. Kostanovskii "Laser-induced ultrafast phase transitions in solids using optical anisotropy", Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); https://doi.org/10.1117/12.321516

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KEYWORDS

Picosecond phenomena

Crystals

Anisotropy

Zinc

Solids

Reflectivity

Ultrafast phenomena

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