Upconversion emission in a carbon-implanted Yb:YAG planar waveguide

作者：Vazquez G V^*; Desirena H; De la Rosa E; Flores Romero E; Marquez H; Rickards J; Trejo Luna R

来源：Optics Communications, 2012, 285(24): 5531-5534.

DOI：10.1016/j.optcom.2012.07.135

• Cooperative upconversion
• Energy transfer
• Rare earths
• YAG
• Optical waveguides

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 Yb3+ 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 Er3+ and Tm3+ ion impurities. The upconversion emission of such ion impurities is explained in terms of an efficient energy transfer from Yb3+ to Er3+ and Tm3+ due to high Yb3+ concentration. The stimulated emission cross section for the F-2(5/2)-%26gt; F-2(7/2) transition of Yb3+ was 1.9 x 10(-20) cm(2). The fluorescence lifetime of the F-2(5/2) level and that of the blue-green band were 1.28 ms and 593 mu s 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 Yb3+ ion pairs.

• 出版日期2012-11-1