The persistent extinction of fluorescence emission of Eu3+ in glasses activated with europium and cerium is reported for the first time to the authors' knowledge. The glass samples containing Eu3+ and Ce3+ were initially colorless and transparent and exhibited intense emission peaks at 592 and 612 nm assigned to the 5D0–7F1, 2 transitions of Eu3+. The complete extinction of the Eu3+-ion emission was obtained as an effect of multipulse excimer-UV-laser (λ = 248 nm, τFWHM ≥ 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
E. Pavel, I. N. Mihailescu, A. Hening, V. I. Vlad, Laura Tugulea, L. Diamandescu, I. Bibicu, and M. Chipara, "Three-dimensional memory effect in fluorescent photosensitive glass activated by europium and cerium," Opt. Lett. 23, 1304-1306 (1998)