Luminescence of trivalent samarium ions in silver and tin co-doped aluminophosphate glass

• Published in: Optical materials Vol. 33; no. 8; pp. 1215 - 1220
• Main Authors: Jiménez, José A., Lysenko, Sergiy, Liu, Huimin, Sendova, Mariana
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2011
• Subjects: Assessments; Dynamics; Energy transfer; Glass; Luminescence; Nanoparticles; Non-crystalline solids; Optical absorption; Photoluminescence; Rare earth metals; Silver; Tin; Nanoparticles; Non-crystalline solids; Optical absorption; Photoluminescence
• DOI: 10.1016/j.optmat.2011.02.013
• ISSN: 0925-3467

► Influence of silver and tin on Sm 3+ luminescence in glass. ► Energy transfer mechanism elucidation and connection with glass structure. ► Effect of Ag nanoparticles on material optical properties. This work presents the spectroscopic properties of trivalent samarium ions in a melt-quenched aluminophosphate glass containing silver and tin. Addition of 4 mol% of each Ag 2O and SnO into the glass system with 2 mol% Sm 2O 3 results in Sm 3+ ions luminescence under non-resonant UV excitation owing to energy transfer from single silver ions and/or twofold-coordinated Sn centers. Assessment of luminescence spectra and decay dynamics suggest the energy transfer mechanism to be essentially of the resonant radiative type. Moreover, a connection between the luminescent and structural properties of the rare-earth doped glass system was demonstrated. Raman spectroscopy characterization revealed that no significant variation in the glass matrix is induced by Sm 3+ doping at the concentration employed. A comparison was made with a structural study performed on the Eu 3+ doped system (containing 2 mol% Eu 2O 3 along with 4 mol% of each Ag 2O and SnO) where the radiative energy transfer mechanism was previously established. The data appears consistent regarding the lack of variation in glass structure upon the Eu 3+ and Sm 3+ doping in connection with the dominance of the radiative transfer in the matrix. Thermal treatment of the material leads to precipitation of Ag nanoparticles of a broad size range inside the dielectric as observed by transmission electron microspcopy. Assessment of 4G 5/2 excited state decay in Sm 3+ ions shows no influence from the silver particles.