Upconversion Emission in Er3+ Doped Novel Bismuthate Glass
来源期刊：JOURNAL OF RARE EARTHS2005年第3期
论文作者：Zhang Liyan Xu Shiqing Hu Lili Sun Hongtao Chen Baoyu DAI Shixun
Key words：inorganic nonmetallic materials; bismuth lead strontiam glass; Er3+ ion; spectroscopic properties; Judd-Ofelt theory; rare earths;
Abstract: Novel Er3+-doped bismuth lead strontiam glass was fabricated and characterized, and the absorption spectrum and upconversion spectrum of the glass were studied. The Judd-Ofelt intensity parameters Ωt (t=2, 4, 6) were found to be Ω2＝3.27×10-20 cm2, Ω4＝1.15×10-20 cm2, and Ω6＝0.38×10-20 cm2. The oscillator strength, the spontaneous transition probabilities, the fluorescence branching ratios, and excited state lifetimes were also measured and calculated. The upconversion emission intensity varies with the power of infrared excitation intensity. A plot of log Iup vs log IIR yields a straight line with slope 1.86, 1.88 and 1.85, corresponding to 525, 546, and 657 nm emission bands, respectively, which indicates that a two-photon process for the red and green emission.
Zhang Liyan1，Xu Shiqing1，Hu Lili1，Sun Hongtao1，Chen Baoyu1，DAI Shixun1
(1.Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China)
Abstract:Novel Er3+-doped bismuth lead strontiam glass was fabricated and characterized, and the absorption spectrum and upconversion spectrum of the glass were studied. The Judd-Ofelt intensity parameters Ωt (t=2, 4, 6) were found to be Ω2＝3.27×10-20 cm2, Ω4＝1.15×10-20 cm2, and Ω6＝0.38×10-20 cm2. The oscillator strength, the spontaneous transition probabilities, the fluorescence branching ratios, and excited state lifetimes were also measured and calculated. The upconversion emission intensity varies with the power of infrared excitation intensity. A plot of log Iup vs log IIR yields a straight line with slope 1.86, 1.88 and 1.85, corresponding to 525, 546, and 657 nm emission bands, respectively, which indicates that a two-photon process for the red and green emission.
Key words:inorganic nonmetallic materials; bismuth lead strontiam glass; Er3+ ion; spectroscopic properties; Judd-Ofelt theory; rare earths;
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