Frequency upconversion properties of Tm3+ doped TeO2-ZnO glasses containing silver nanoparticles
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
25/09/2012
|
| Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Frequency upconversion (UC) properties of Tm3+ doped TeO2-ZnO glasses containing silver nanoparticles (NPs) were investigated. Infrared-to-visible and infrared-to-infrared UC processes associated to the Tm3+ ions were studied by exciting the samples with a cw 1050 nm ytterbium laser. The luminescence intensity as a function of laser intensity was also measured using a pulsed 1047 nm Nd3+:YVO laser in order to determine the number of photons participating in the UC processes. Enhancement of the UC signals for samples heat-treated during various time intervals is attributed to the growth of the local field in the vicinity of the NPs. PL enhancement by one-order of magnitude was observed in the whole spectrum of the samples heat-treated during 48 h. on the other hand PL quenching was observed for the samples heat-treated more than 48 h. (c) 2011 Elsevier B.V. All rights reserved. |
| Formato |
S504-S506 |
| Identificador |
http://dx.doi.org/10.1016/j.jallcom.2011.12.078 Journal of Alloys and Compounds. Lausanne: Elsevier B.V. Sa, v. 536, p. S504-S506, 2012. 0925-8388 http://hdl.handle.net/11449/41129 10.1016/j.jallcom.2011.12.078 WOS:000310837500110 |
| Idioma(s) |
eng |
| Publicador |
Elsevier B.V. Sa |
| Relação |
Journal of Alloys and Compounds |
| Direitos |
closedAccess |
| Palavras-Chave | #Nanostructured materials #Rare-earth compounds #Optical properties #Luminescence #Localized surface plasmons #Frequency upconversion |
| Tipo |
info:eu-repo/semantics/article |
