Morphology and photoluminescence properties of Er3+-doped CaF2 nanocrystals patterned by laser irradiation in oxyfluoride glasses
Morphology and photoluminescence properties of Er3+-doped CaF2 nanocrystals patterned by laser irradiation in oxyfluoride glasses
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DOI：
10.1016/j.jfluchem.2012.10.007
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发表时间：
2013
影响因子：
1.9
通讯作者：
K. Shinozaki;A. Noji;T. Honma;T. Komatsu
中科院分区：
文献类型：
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作者：
K. Shinozaki;A. Noji;T. Honma;T. Komatsu
通过激光照射在铝硼硅酸盐基氟氧化物玻璃中形成掺有 Er3+ 的 CaF2 纳米晶体的线条图案。通过透射电子显微镜 (TEM) 观察结合聚焦离子束样品制备来检查 CaF2 纳米晶体的形貌和分散状态。靠近线中心的区域中存在的CaF2纳米晶体的尺寸大于靠近线边缘的区域中的CaF2纳米晶体的尺寸。线部分的微光致发光（PL）光谱显示出与Er3+离子的f-f跃迁相对应的清晰发射，并且阐明了CaF2纳米晶体的形态和分散状态与掺入CaF2纳米晶体中的Er3+离子的PL特性（斯塔克分裂的强度和程度）之间的相关性。从温度分布模型出发，讨论了激光照射部分CaF2纳米晶的形成机理。
Lines with Er3+-doped CaF2nanocrystals were patterned by laser irradiations in aluminoborosilicate-based oxyfluoride glasses. The morphology and dispersion state of CaF2nanocrystals were examined from transmission electron microscope (TEM) observations combined with focused ion beam sample preparations. The size of CaF2nanocrystals present in the region close to the center of lines was larger than that in the region close to the edge of lines. Micro-photoluminescence (PL) spectra for the line part showed clear emissions corresponding to the f–f transitions of Er3+ions, and the correlation between the morphology and dispersion state of CaF2nanocrystals and PL properties (intensity and degree of the Stark splitting) of Er3+ions incorporated into in CaF2nanocrystals was clarified. The formation mechanism of CaF2nanocrystals in the laser irradiated part was discussed from the temperature distribution model.