Abstract

The persistent extinction of fluorescence emission of Eu<sup>3+</sup> in glasses activated with europium and cerium is reported for the first time to the authors' knowledge. The glass samples containing Eu<sup>3+</sup> and Ce<sup>3+</sup> were initially colorless and transparent and exhibited intense emission peaks at 592 and 612 nm assigned to the <sup>5</sup><i>D</i><sub>0</sub>–<sup>7</sup><i>F</i><sub>1, 2</sub> transitions of Eu<sup>3+</sup>. The complete extinction of the Eu<sup>3+</sup>-ion emission was obtained as an effect of multipulse excimer-UV-laser (λ = 248 nm, τ<sub>FWHM</sub> ≥ 20 ns) irradiation of the glass samples. Fluorescence microscopy, Mössbauer spectrometry, and electron spin resonance were applied for investigation of the modifications induced by the laser treatment. As a decisive proof of the extinction of fluorescence we succeeded in recording three-dimensional fluorescent photographic patterns within the activated samples.

© 1998 Optical Society of America

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