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Host dependent frequency upconversion of Er3+/Yb3+-codoped bismuth-germanate glasses
Longjun Lu1, Qiuhua Nie, Xiang Shen
1Faculty of Information Science and Engineering, Ningbo University, The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo 315211, China. lonelu@163.com
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|December 5, 2006
Summary
Bismuth oxide enhances upconversion fluorescence in Er3+/Yb3+-codoped glasses. This study investigates how bismuth oxide content affects green and red emissions for potential optical applications.
Area of Science:
- Materials Science
- Optics and Photonics
- Inorganic Chemistry
Background:
- Upconversion fluorescence is crucial for advanced optical materials.
- Erbium (Er3+) and Ytterbium (Yb3+) ions are key dopants for upconversion.
- Bismuth oxide (Bi2O3) is explored for its potential to enhance optical properties.
Purpose of the Study:
- To investigate the effect of Bi2O3 content on the upconversion fluorescence spectra of Er3+/Yb3+-codoped glasses.
- To analyze the relationship between Bi2O3 concentration and emission intensities.
- To understand the role of Bi2O3 in upconversion mechanisms.
Main Methods:
- Synthesis of xBi(2)O(3)-(90-x)GeO(2)-10Na(2)O (BGN x) glasses with varying Bi2O3 content (x=31-51 mol%).
- Spectroscopic analysis including absorption and upconversion fluorescence measurements.
- Infrared (IR) spectroscopy to study the influence of Bi2O3 on glass structure.
Main Results:
- Simultaneous observation of intense green (533, 548 nm) and red (659 nm) upconversion emissions from Er3+ at room temperature.
- Upconversion emission intensity is dependent on excitation power.
- Bi2O3 significantly influences the intensity of both green and red emissions, with its effect analyzed via IR spectra.
Conclusions:
- Bi2O3 plays a critical role in enhancing upconversion fluorescence intensity in these glasses.
- The concentration of Bi2O3 can be tuned to control green and red emission characteristics.
- These findings suggest potential applications for these glasses in optical devices.
