Effect of alkali metal oxides on upconversion fluorescence properties of germanatetellurite glasses
摘要
Upconversion emissions of Yb^3+/Er^3+-codoped germanate-tellurite glasses have been investigated upon the excitation of 980 nm laser diode (LD). It is found that upconversion luminescence intensities significantly increase with the increasing size of alkali metal ions. Raman spectra show that the maximum phonon energies (MPE) of glass hosts are unchanged with the replacement of alkali metal oxides, indicating that MPE is not the reason for the increase of upconversion fluorescence intensities. The analysis of the non-radiative transition of Er^3+ demonstrates that the decrease of the maximum energy phonon density is the main reason for the enhanced fluorescence intensities.
引用本文（GB/T 7714）
YANGZhongmin, JiangZhong-Hong. Effect of alkali metal oxides on upconversion fluorescence properties of germanatetellurite glasses[J]. 中国科学通报：英文版, 2004.
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