Propriedades ópticas dos vidros BBZP dopados com Nd e Ag

Abstract

The study of oxide glasses doped with rare-earth Nd3+ and with Ag nanoparticles is of great technological interest because of its use in infrared lasers, high-density optical storage devices etc. The impact of silver nanoparticles on Nd3+ emission attributes when they are present in the co-doping of the borate glass matrix whose structure is B2O3-Bi2O3-ZnO-P2O5 (BBZP) is the focus of the present work. The attempt to nucleate and grow silver nanoparticles as a result of heat treatment performed on the samples at 500°C was studied and discussed. It was observed a decrease in absorption and emission of samples doped with Nd and Ag in comparison with samples that were doped only with Ag, through absorption measurements made in ultravioletvisible, near infrared (NIR) and measurements of photoluminescence. Structural changes in the glass matrix were also studied using Raman spectroscopy and mid-infrared absorption (MIR) techniques and comparisons with results previously obtained results from the literature. Analyzes of the radioactive decay lifetime of the samples were performed using the timeresolved photoluminescence technique that provided us with results of 0.16 ms for the neodymium transition at 1060 nm. In general terms, the BBZP matrix co-doped with Nd and Ag did not increase neodymium emission, which was the expected result. However, we observed intense emission at 1040 and 1084 nm when the silver-doped matrix was pumped with a 325 nm laser. This emission increase was also verified in the samples co-doped with neodymium regarding the emission of 1084 nm.