A comparative enhancement of Au and Ag NPs role on radiative properties in Sm doped zinc-sodium tellurite glass: Judd-Ofelt parameter.

Enhanced red and orange fluorescence emissions of Sm Rare earth (RE) ions were observed in sodium‑zinc tellurite glasses embedded with silver and gold nanoparticles (NPs). The fine distribution of NPs in the glass matrix with an average diameter ~ 11.09 nm and ~3.86 nm for Ag and Au NPs respectively were confirmed by using transmission electron microscope (TEM). The embedding of Ag and Au NPs into the glass structure caused an increasing in the transition emission intensity of Sm ions, which is ascribed to the progress of the presence of the localized surface Plasmon resonance (LSPR) indicating from the characteristic absorption peaks. The luminescence and absorption spectra have been discussed using a standard hypothesis Judd-Ofelt theory for a certain absorption transitions P, I, F, F, F, F, F, H, F and emission transitions H, H, H and H under 409 nm excitation of the Sm ions. The decay life time curve exhibited a non-exponential behavior of the studied glass samples and the results were compared with the similar reported glasses. An efficient red and orange fluorescence emission illustrate that the Sm-doped sodium‑zinc tellurite embedded with Ag and Au NPs are potential materials for the laser illumination.