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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Upconversion and concentration quenching in Er3+-doped TeO2–Na2O binary glasses
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Upconversion and concentration quenching in Er3+-doped TeO2–Na2O binary glasses

机译：掺Er3 +的TeO2-Na2O二元玻璃的上转换和浓度猝灭

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摘要

The spectroscopic properties of Er3+-doped alkali tellurite TeO2–Na2O glasses are investigated. Infrared-to-visible upconversion emission bands are observed at 410, 525, 550 and 658 nm using 797 nm excitation wavelength. These bands are assigned to the 2H9/2 → 4I15/2, 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transition, respectively. The power dependence study reveals that the 2H9/2 → 4I15/2 transition involves a three-step process while the other upconversion transitions involve only two steps. An excitation with 532 nm wavelength, two upconversion bands are observed in the UV region at 380 and 404 nm in addition to bands in the visible region at 410, 475, 525, 550, 658 and 843 nm. These bands are ascribed to 4G11/2 → 4I15/2, 2P3/2 → 4I13/2, 2H9/2 → 4I15/2, 2P3/2 → 4I11/2, 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, 4F9/2 → 4I15/2 and 4S3/2 → 4I13/2 transition, respectively. Increasing Er3+ concentration leads to a rapid growth in the intensity of red emission relative to that for the green emission. An explanation for this observation has been suggested. The temperature dependence profile for the two thermally coupled levels (2H11/2, 4S3/2) shows that they can be used for measuring the temperature.
机译：研究了掺Er3 +的碱亚碲酸盐TeO2-Na2O玻璃的光谱性质。使用797 nm激发波长，在410、525、550和658 nm处观察到了红外到可见光的上转换发射带。这些频段分别分配给2H9 / 2→4I15 / 2、2H11 / 2→4I15 / 2、4S3 / 2→4I15 / 2和4F9 / 2→4I15 / 2过渡。功率相关性研究表明，2H9 / 2→4I15 / 2转换涉及三个步骤，而其他上转换转换仅涉及两个步骤。波长为532 nm的激发，除了在410，475，525，550，658和843 nm的可见光带中，在380和404 nm的UV区还观察到两个上转换带。这些频段归因于4G11 / 2→4I15 / 2、2P3 / 2→4I13 / 2、2H9 / 2→4I15 / 2、2P3 / 2→4I11 / 2、2H11 / 2→4I15 / 2、4S3 / 2→4I15 / 2、4F9 / 2→4I15 / 2和4S3 / 2→4I13 / 2转换。 Er3 +浓度的增加导致红色发射强度相对于绿色发射强度的快速增长。建议对此现象进行解释。两个热耦合能级（2H11 / 2，4S3 / 2）的温度依赖性曲线表明，它们可用于测量温度。

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