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http://cio.repositorioinstitucional.mx/jspui/handle/1002/568| Upconversion Emission In A Carbon-Implanted Yb:Yag Planar Waveguide | |
| GLORIA VERONICA VAZQUEZ GARCIA HAGGEO DESIRENA ENRRIQUEZ ELDER DE LA ROSA CRUZ | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Light confinement and spectroscopic properties of a Yb:YAG planar waveguide fabricated by ion implantation were investigated. Under 970 nm excitation, cooperative upconversion and near infrared luminescence were observed. The interaction between Yb3þ ion pairs was responsible for the appearance of a blue–green band centered at 514 nm. However, several more bands in the blue, green and red regions were detected and are related to Er3þ and Tm3þ ion impurities. The upconversion emission of such ion impurities is explained in terms of an efficient energy transfer from Yb3þ to Er3þ and Tm3þ due to high Yb3þ concentration. The stimulated emission cross section for the 2F5/2-2F7/2 transition of Yb3þ was 1.91020 cm2. The fluorescence lifetime of the 2F5/2 level and that of the blue– green band were 1.28 ms and 593 ms respectively. The self-convolution of IR emission was calculated and the result shows that the main peak is centered at 514 nm. Such self-convolution and the fact that the blue–green band lifetime is half the IR lifetime are good evidences for cooperative emission of Yb3þ ion pairs. | |
| 21-08-2012 | |
| Artículo | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Aparece en las colecciones: | Articulos Arbitrados 2012 |
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