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Opt Express. 2008 Mar 17;16(6):3912-7.

Femtosecond laser-induced oriented precipitation of Ba2TiGe2O8 crystals in glass.

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  • 1Department of Physics, Shanghai University, Shanghai 200444, China.


Ba(2)TiGe(2)O(8) crystals were selectively precipitated on femtosecond laser irradiated BaO-TiO(2)-GeO(2) glass surface. Furthermore, the crystal could grow from the surface of glass to the interior towards the laser movement direction when the laser focus was continuously moved. The laser-induced crystal was confirmed to be Ba(2)TiGe(2)O(8) phase by x-ray diffraction analysis and micro-Raman spectra. We also observed blue light due to double-frequency conversion of the 800nm incident laser in the crystallized regions. We propose the observed phenomena resulted from the femtosecond laser-assisted orientation of precipitation of crystal.

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