调控声子提高Tm3+掺杂体系的频率上转换荧光

应用激光光谱学技术，探讨了Tm³⁺离子掺杂透明氟氧化物玻璃陶瓷体系中声子调控对红色激光抽运荧光辐射性质的影响. 研究了基质结构和样品环境温度与电声子相互作用的联系以及声子变化对于荧光辐射产生的影响. 发现改变基质材料的SiO₂含量能影响蓝色上转换荧光效率. 另外，依据温度与声子能量之间的联系，通过改变样品环境温度可明显调节低声子基质材料中掺杂离子激发态能级的布居速率，改变上转换效率. 关键词： 荧光辐射 声子 无辐射弛豫 荧光寿命

Improvement on the up-conversion fluorescence emission in Tm3+ doped optical materials by adjusting phonon distribution

The influence of phonon distribution on the frequency upconverted fluorescence emission is studied with laser spectroscopy in different matrices and at different ambient temperatures. The spectrum of phonon energy can be adjusted by varying the content of SiO₂ in the oxyfluoride glass and glass ceramics, which affects the upconverted fluorescence emission of doped ions. Since the phonon energy depends on the sample temperature, the variation of the temperature can also influence the population rate of ³H₄ level in Tm³⁺ doped low-phonon-energy LaF₃ crystal, resulting in a change of the fluorescence upconversion.