| Effect of alkali metal oxides on upconversion fluorescence properties of germanatetellurite glasses |
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| 作者姓名： | YANGZhongmin JIANGZhonghong |
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| 作者单位： | [1]InstituteofOpticalCommunicationMaterials,SouthChinaUniversityofTechnology,Guangzhou510641,China [2]KeyLabofSpeciallyFunctionalMaterialsandAdvancedManufacturingTechnology,MinistryofEducation,Guangzhou510641,China |
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| 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.
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| 关 键 词： | 荧光特性 锗酸盐 亚碲酸盐 玻璃 碱性氧化物 合成工艺 |
| 收稿时间： | 18 August 2004 |
Effect of alkali metal oxides on upconversion fluorescence properties of germanate-tellurite glasses |
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| YANGZhongmin JIANGZhonghong.Effect of alkali metal oxides on upconversion fluorescence properties of germanatetellurite glasses[J].Chinese Science Bulletin,2004,49(24):2572-2574. |
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| Authors: | Zhongmin Yang Zhonghong Jiang |
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| Institution: | (1) Institute of Optical Communication Materials, South China University of Technology, 510641 Guangzhou, China;(2) Key Lab of Specially Functional Materials and Advanced Manufacturing Technology, Ministry of Education, 510641 Guangzhou, China |
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| Abstract: | Upconversion emissions of Yb3+/Er3+-codoped germanate-tellurite glasses have been investigated upon the excitation of 980 nm laser diode (LD). It is found that up- conversion 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 Er3+ demonstrates that the de- crease of the maximum energy phonon density is the main reason for the enhanced fluorescence intensities. |
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| Keywords: | glass upconversion alkali metal ions phonon energy |
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