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25 October 2011 Soda-zinc-aluminosilicate glasses doped with Tb3+, Ce3+, and Sm3+ for frequency conversion and white light generation
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Sodium-zinc-aluminosilicate (NaZAS) glasses doped with single or multiple rare earth ions (Ce3+, Tb3+, Sm3+) were synthesized, and their characteristics investigated by m-line spectroscopy, absorption and luminescence spectroscopy, and micro-Raman spectroscopy. Blue-white light, with x = 0.24 and y = 0.24 CIE chromaticity coordinates, was obtained for the Tb3+ singly-doped glass excited at 351 nm. In NaZAS glasses co-doped with Ce3+ and Tb3+ it was possible to observe a non-radiative energy transfer from Ce3+ to Tb3+ ions upon 320 nm excitation; the Ce3+→Tb3+ energy transfer microscopic parameter and efficiency were obtained from the analysis of the cerium emission decay curve. Different concentrations of Ce3+ and Tb3+ ions in the same glass host give rise to blue and blue-green emissions, with different CIE coordinates. Optical waveguides were also produced in the samples by means of Ag+-Na+ ion exchange process, and characterized.
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Simone Berneschi, Massimo Brenci, Giancarlo C. Righini, Marco Bettinelli, Adolfo Speghini, Ulises Caldiño, Enrique Álvarez, Alessandro Chiasera, Sreeramulu Valligatla, and Maurizio Ferrari "Soda-zinc-aluminosilicate glasses doped with Tb3+, Ce3+, and Sm3+ for frequency conversion and white light generation", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801159 (25 October 2011);

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