Er^(3+)/Yb^(3+)共掺杂纯氧化物材料上转换发光特性的研究

Studies on the Properties of Frequency Upconversion of Yb^(3+)/Er^(3+) Codoped Absolute Oxides

对实验制备的Er3+/Yb3+共掺杂3CaO-Al2O3-3SiO2样品在980激发下的上转换发光特性进行了研究,检测到由处于激发态能级2H11/2,4S3/2和4F9/2的Er3+离子分别向基态4I15/2跃迁时发出的波长依次为523,547和656 nm的上转换发光。做出了上转换发光强度与激发功率关系的曲线图,并结合测得的声子能量对相应跃迁机制进行了分析,发现上转换过程中Yb3+对的敏化作用起主要作用。

Samples of Er^3＋/Yb^3＋ codoped 3CaO-Al2O3-3SiO2 compounds were prepared, and the properties of frequency uptonversion of the samples under the excitation of 980 nm diode laser were studied. Green and red emissions centered at 523,547 and 656 nm, corresponding to the transitions ^2H（11/2）→^4I（15/2）, ^4S（3/2）→^4I（15/2）, and ^4F（9/2）→^4I（15/2）, respectively, were observed. The dependence of the upconversion fluorescence intensity on the pumping power, and the phonon energy of each sample were observed, and the mechanism of frequency upconversion based on these two items was discussed.