Effect of silver nanoparticles on the visible upconversion emission of Er3+/Yb3+ co-doped SbPO4-GeO2 glasses - Capelo, Renato Grigolon; Rubio, Thiago Israel; Calderón, Gaston Lozano; Moraes, Daniel Angeli de; Marega Junior, Euclydes; Nalin, Marcelo; Manzani, Danilo (Optical Materials, 2023)