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首页> 外文期刊>Physical review >Evidence of formation of tightly bound rare-earth clusters in chalcogenide glasses and their evolution with glass composition
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Evidence of formation of tightly bound rare-earth clusters in chalcogenide glasses and their evolution with glass composition

机译：硫族化物玻璃中紧密结合的稀土簇的形成及其随玻璃组成的演变

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摘要

We present spectroscopic evidence for the formation of tightly bound Nd~(3+) clusters in chalcogenide glasses in which Nd~(3+) ions are so close that no appreciable fluorescence is observed. According to a theoretical calculation using the rate-equation modeling and comparison with experimental results, this type of cluster contributes as the main source of energy transfer among Nd~(3+) ions in Ga-free glasses, resulting in the strong fluorescence quenching. It is proposed that the total volume of such Nd~(3+) clusters sharply decreases with Ga doping, while the spatial distance among Nd~(3+) ions in clusters remains close enough for there to be no detectable fluorescence from these clustered Nd~(3+) ions. Such clusters are then completely dissolved in glasses once a critical Ga concentration is reached.
机译：我们提供光谱证据，证明在硫属化物玻璃中形成紧密结合的Nd〜（3+）簇，其中Nd〜（3+）离子非常接近，因此未观察到明显的荧光。根据使用速率方程模型进行的理论计算并与实验结果进行比较，这种簇是无镓玻璃中Nd〜（3+）离子之间能量转移的主要来源，从而导致强烈的荧光猝灭。提出随着Ga的掺杂，这种Nd〜（3+）簇的总体积急剧减小，而簇中Nd〜（3+）离子之间的空间距离保持足够近，以至于这些簇Nd没有可检测到的荧光。 〜（3+）个离子。一旦达到临界Ga浓度，这些簇就完全溶解在玻璃中。

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  • 来源
    《Physical review》 |2009年第18期|180202.1-180202.4|共4页
  • 作者

    T. H. Lee; S. I. Simdyankin; L. Su; S. R. Elliott;

  • 作者单位

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom;

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom WPl Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom;

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom;

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  • 正文语种 eng
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  • 关键词

    glasses; amorphous materials; glasses and other disordered solids; laser materials;

    机译：眼镜;无定形材料;眼镜和其他杂物;激光材料;

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