Titania nanoparticles embedded Er3+-Sm3+ co-doped sulfophosphate glass: Judd-Ofelt parameters and spectroscopic properties enhancement.

The conventional melt quenching method was used to synthesis erbium and samarium ions co-doped sulfophosphate glasses containing TiO 2 nanoparticles with the molar compositions of (58.0-x)P 2 O 5 -20.0MgO-20.0ZnSO 4 -1.0Sm 2 O 3 -1.0Er 2 O 3 -xTiO 2 with x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 mol%. The X-ray diffraction (XRD) technique was applied to verify that the nature of fabricated glass samples is of amorphous type. Judd-Ofelt (JO) intensity (Ω i) parameters were determined through spectral data provided in the investigations conducted on the optical absorption. The applied JO parameterization illustrates the covalency related to rare-earth (RE) ions and ligands. For some given lasing levels, the radiative parameters were estimated including branching ratios (β R), radiative lifetimes (τ R), and radiative transition probabilities (A). The photoluminescence spectra provided in some studies are used to evaluate the stimulated emission cross-sections (σ p E) for some important lasing transitions including 4G 5/2 → 6H 5/2 , 4G 5/2 → 6H 7/2 , and 4G 5/2 → 6H 9/2. The determined radiative parameters are potential options as a candidate for lasing. • Erbium and samarium ions co-doped sulfophosphate glasses containing TiO 2 nanoparticles glasses were prepared. • The average size of the TNPs was obtained 18 ± 1 nm. • Intensified Raman signal can be related to the contribution of SPR that results in an enlarged local electric field. • PMZSE0.8Ti glass sample can be considered as an effective option in the photonic applications. [ABSTRACT FROM AUTHOR]