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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Up-conversion luminescence analysis in ytterbium-sensitized erbium-doped oxide-halide tellurite and germanate-niobic-lead glasses
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Up-conversion luminescence analysis in ytterbium-sensitized erbium-doped oxide-halide tellurite and germanate-niobic-lead glasses

机译：敏化掺oxide氧化物卤化物亚碲酸盐和锗酸盐-铌酸铅玻璃的上转换发光分析

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Ytterbium-sensitized erbium-doped oxide-halide tellurite and germanate-niobic-lead glasses have been synthesized by conventional melting method. Intense green and red emissions centered at 525, 546 and 657 nm, corresponding to the transitions H-2(11/2) -> I-4(15/2), S-4(3/2) -> I-4(15/2) and F-4(9/2) -> I-4(15/2), respectively, were simultaneously observed at room temperature in these glasses. The quadratic dependence of the 525, 546 and 657 nm emissions on excitation power indicates that a two-photon absorption process occurs. Tellurite glass showed a weaker up-conversion emission than germanate-niobic-lead glass, which is inconsistent with the prediction from the difference of maximum phonon energy between tellurite and germanate-mobic-lead glasses. In this paper, Raman spectroscopy was employed to investigate the origin of the difference in up-conversion luminescence in the two glasses. Compared with phonon side-band spectroscopy, Raman spectroscopy extracts more information including both phonon energy and phonon density. Our results reveal that the phonon density and the maximum phonon energy of host glasses are both important factors in determining the up-conversion efficiency. (c) 2005 Elsevier B.V. All rights reserved.
机译：conventional敏化的掺oxide氧化物卤化物碲化物和锗酸铌铅玻璃已经通过常规的熔融方法合成。集中在525、546和657 nm处的强烈绿色和红色发射光，对应于过渡H-2（11/2）-> I-4（15/2），S-4（3/2）-> I-4这些玻璃在室温下同时分别观察到（15/2）和F-4（9/2）→I-4（15/2）。 525、546和657 nm发射对激发功率的二次依赖性表明发生了双光子吸收过程。碲酸盐玻璃的上转换辐射比锗酸铌铅玻璃弱，这与碲酸盐玻璃与锗酸铅铅玻璃之间最大声子能量差的预测不一致。在本文中，拉曼光谱被用来研究两种玻璃的上转换发光差异的起源。与声子边带光谱法相比，拉曼光谱法提取了更多的信息，包括声子能量和声子密度。我们的结果表明，主玻璃的声子密度和最大声子能量都是决定上转换效率的重要因素。 （c）2005 Elsevier B.V.保留所有权利。

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