Enhanced infrared-to-visible frequency upconversion in Yb3+/Er3+ codoped Bi2O3-GeO2 glasses with embedded silver nanoparticles

Journal of Non-Crystalline Solids v. 498, p. 395-400, 2018 2.488 10.1016/j.jnoncrysol.2018.03.019 Kassab, L. R. P.; Kumada, D. K. ; Silva, D. M. da; Garcia, J. A. M. 2018