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首页> 外文会议>Formation, structure and properties of glasses >LIGAND FIELD AND BRANCHING RATIO OF ULTRAVIOLET AND BLUE UPCONVERSIONS OF Tm~(3+) IONS IN FLUORIDE AND OXIDE GLASSES
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LIGAND FIELD AND BRANCHING RATIO OF ULTRAVIOLET AND BLUE UPCONVERSIONS OF Tm~(3+) IONS IN FLUORIDE AND OXIDE GLASSES

机译：氟化物和氧化物玻璃中紫外线的配体场和分枝比以及Tm〜（3+）离子的蓝色上转换

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摘要

Tm~(3+) doped gerrnanate, tellurite and heavy-metal fluoride glasses were prepared and their upconversion luminescence spectra were measured to investigate the effect of the host glass on the branching ratios, β of ~1D_2 → ~3H_6 at 0.36μm and ~1D_2 → ~3F_4 at 0.45μm. Because the radiative emission probabilities of these electric-dipole transitions are functions of Judd-Ofelt intensity parameters Ω_t and the sets of reduced matrix elements < || U~((t)) || > (t=2,4,6), it was possible to vary the β of both transitions. The β of 0.45 μm luminescence increases slightly with increasing Ω_2 parameter, whereas β of 0.36μm decreased. The ratio of β_(36)/β_(45) was largest in a fluorozincate glass and lowest in a tellurite glass. The result could be well explained by the smaller Ω_2/Ω_4 ratio in fluoride glasses than those in oxide glasses. The correlation between the luminescence intensity ratio and the Ω_t parameters shows that we can control the branching ratio by the ligand field design for Tm~(3+) in glass matrix.
机译：制备了掺有Tm〜（3+）的草酸盐，亚碲酸盐和重金属氟化物玻璃，并测量了它们的上转换发光光谱，以研究基质玻璃对支化比，〜1D_2→〜3H_6在0.36μm和〜处的β的影响。 1D_2→〜3F_4在0.45μm。因为这些电偶极跃迁的辐射发射概率是Judd-Ofelt强度参数Ω_t和简化矩阵元素集<||的函数。 U〜（（t））|| >（t = 2,4,6），可以改变两个跃迁的β。随着Ω_2参数的增加，发光的β值为0.45μm，而发光系数为0.36μm则有所降低。 β_（36）/β_（45）之比在氟锌酸盐玻璃中最大，在碲酸盐玻璃中最低。氟化物玻璃中的Ω_2/Ω_4比氧化物玻璃中的Ω_2/Ω_4比率小，可以很好地解释这一结果。发光强度比与Ω_t参数的相关性表明，我们可以通过配体场设计来控制玻璃基质中Tm〜（3+）的支化比。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    Setsuhisa TANABE; Kiyoshi TAMAI; Kazuyuki HIRAO; Naohiro SOGA;

  • 作者单位

    Department of Materials Chemistry, Faculty of Integrated Studies, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan;

    Department of Materials Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan;

    Department of Materials Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan;

    Department of Materials Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 玻璃工业;
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