倍半氧化物
离子
激发态
分析化学(期刊)
辐射传输
发射光谱
兴奋剂
材料科学
荧光
吸收截面
化学
激发
吸收光谱法
吸收(声学)
分枝分数
原子物理学
谱线
横截面(物理)
光学
光电子学
物理
复合材料
有机化学
色谱法
天文
冶金
量子力学
作者
R. Moncorgé,Y. Guyot,Christin Kränkel,Kheirréddine Lebbou,Akira Yoshikawa
标识
DOI:10.1016/j.jlumin.2021.118537
摘要
Tm3+-doped sesquioxides Y2O3, Lu2O3 and Sc2O3 are well known for their emissions around 2 μm (3F4 →3H6 transition). We study here their absorption and emission properties, both at 2 μm and at 1.5 μm (3H4 → 3F4) and 2.3 μm (3H4 → 3H5), by considering that the totality of the Tm3+ ions or only part of them are contributing to the line intensities. The study is also extended to the Tm3+-doped mixed compounds LuYO3, LuScO3 and YScO3. The results obtained in terms of radiative lifetimes and branching ratios, as derived from a Judd-Ofelt analysis of the absorption data, thus appear to be more consistent with the measured fluorescence decays, by assuming that only 75% of the Tm3+ ions, those sitting into C2 symmetry sites, are involved in the absorption and the emission spectra. The registered emission spectra are then calibrated in cross section unit and some of them compared between each other depending on the method (reciprocity, modified reciprocity or Füchtbauer method) which is used. Calculations are finally carried out to predict the cross section of important excited-state transitions which are involved in the two-step excitation pumping of the 3H4 emitting level around 1.05 μm (3F4 → 3F2,3) and 1.45 μm (3F4 → 3H4).
科研通智能强力驱动
Strongly Powered by AbleSci AI