Articles you may be interested inInvestigation on the near-infrared-emitting thermal stability of Bi activated alkaline-earth aluminoborosilicate glasses J. Appl. Phys. 117, 053107 (2015); 10.1063/1.4907565In-situ characterization of femtosecond laser-induced crystallization in borosilicate glass using time-resolved surface third-harmonic generation

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We report the one-step precipitation of CdS quantum dots in the volume of CdS-doped silicate glass under the focused femtosecond laser beam without additional heat treatment of glass. Femtosecond direct laser writing leads to the annular distribution of the precipitated CdS quantum dots in laser-written domain optical properties of which could be tuned by laser beam parameters. Increasing the laser pulse number to 10 significantly enhances luminescence intensity in the domains, while further increasing up to 10 pulses leads to luminescence quenching. A possible scenario for the formation and distribution of quantum dots is proposed.

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We report on a technique of femtosecond laser-induced crystallization of glass, allowing improvement in the homogeneity of continuous crystalline tracks formed in lanthanum borogermanate glass using a focused beam with the elliptical-shaped waist cross section instead of a conventional circular one. Second harmonic generation produced by near-infrared femtosecond laser pulses was demonstrated in the waveguiding mode for the laser written crystalline track. The structure of the fabricated single crystalline waveguides is investigated with high resolution transmission electron microscopy and micro-Raman spectroscopy.