Investigation of the nonlinear absorption and refraction spectra of lead-germanium oxide glasses containing silver nanoparticles - De Boni, Leonardo; Barbano, Emerson Cristiano; Assumpção, Thiago Alexandre Alves de; Kassab, Luciana Reyes Pires; Misoguti, Lino; Zílio, Sérgio Carlos (Brazilian MRS Meeting, 2012)