White light generation controlled by changing the concentration of silver nanoparticles hosted by Ho<sup>3+</sup>/Tm<sup>3+</sup>/Yb<sup>3+</sup> doped GeO<inf>2</inf>-PbO glasses
Frequency upconversion (UC) experiments were performed with GeO<inf>2</inf>-PbO glasses, containing silver nanoparticles (NPs), doped with holmium (Ho<sup>3+</sup>), thulium (Tm<sup>3+</sup>) and ytterbium (Yb<sup>3+</sup>) ions. The samples were excit...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/167819 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.jallcom.2015.04.108 http://hdl.handle.net/11449/167819 |
| Access Level: | acceso abierto |
| Palabra clave: | Energy transfer Frequency upconversion Germanate glass Rare-earth ions Silver nanoparticles White light generation |
| Sumario: | Frequency upconversion (UC) experiments were performed with GeO<inf>2</inf>-PbO glasses, containing silver nanoparticles (NPs), doped with holmium (Ho<sup>3+</sup>), thulium (Tm<sup>3+</sup>) and ytterbium (Yb<sup>3+</sup>) ions. The samples were excited using a continuous-wave diode laser operating at 980 nm. The UC intensities and the colors of the samples were controlled by changing the concentrations of the rare-earth ions (REI) and the silver NPs nucleated inside the samples. The colors observed spanned the visible range from the red-yellow to the blue. For a particular combination of silver NPs and REI concentrations it was obtained white light generation corresponding to the CIE coordinates X = 0.33 and Y = 0.33. |
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