Frequency upconversion properties of Tm3+ doped TeO2-ZnO glasses containing silver nanoparticles
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
25/10/2013
25/10/2013
2012
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| Resumo |
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. Conselho Nacional de Desenvolvimento Cientifico e tecnologico (CNPq) through the National Institute of Photonics (INCT Project) Conselho Nacional de Desenvolvimento Cientifico e tecnologico (CNPq) through the National Institute of Photonics (INCT Project) Fundacao de Amparo a Ciencia e Tecnologia de Pernambuco (FACEPE) Fundacao de Amparo a Ciencia e Tecnologia de Pernambuco (FACEPE) |
| Identificador |
JOURNAL OF ALLOYS AND COMPOUNDS, LAUSANNE, v. 536, n. 4, supl. 1, Part 3, pp. S504-S506, SEP 25, 2012 0925-8388 http://www.producao.usp.br/handle/BDPI/36092 10.1016/j.jallcom.2011.12.078 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE SA LAUSANNE |
| Relação |
JOURNAL OF ALLOYS AND COMPOUNDS |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE SA |
| Palavras-Chave | #NANOSTRUCTURED MATERIALS #RARE-EARTH COMPOUNDS #OPTICAL PROPERTIES #LUMINESCENCE #LOCALIZED SURFACE PLASMONS #FREQUENCY UPCONVERSION #NANOSTRUCTURES #LUMINESCENCE #CHEMISTRY, PHYSICAL #MATERIALS SCIENCE, MULTIDISCIPLINARY #METALLURGY & METALLURGICAL ENGINEERING |
| Tipo |
article original article publishedVersion |
