研究了掺Er3+硅酸盐玻璃的吸收光谱和上转换光谱, 应用Judd-Ofelt理论计算了Er3+强度参数Ωλ(λ=2、4、6)、跃迁振子强度、自发辐射几率、荧光分支比. 上转换光谱分析表明: 在522、545、658nm处有较强的绿光和红光, 分别对应于2H11/2→4I15/2、4S3/2→4I15/2、4F9/2→4I15/2的跃迁, 发光曲线拟合斜率分别为1.67, 1.94, 1.76; 上转换发光机制主要是激发态吸收和能量转换, 且均为双光子吸收过程.
Absorption spectra and up-conversion emission spectra of Er3+-doped silicate glasses were investigated. The intensity parameters Ωλ(λ=2,4,6), the oscillator strength, the spontaneous transition probabilities and the fluorescence branching ratios were calculated by the theory of Judd-Ofelt. The up-conversion emission spectra show there are stronger green light and red light centered about 522nm, 545nm and 658nm, corresponding to the transition of 2H11/2→4I15/2、4S3/2→4I15/2、4F9/2→4I15/2, and the slope of fitted lines is 1.76, 1.94, 1.67, respectively, which indicates a two-photon process for the green and red light. The up-conversion mechanisms are determined to be excited state absorption and energy transfer.
参考文献
| [1] | Wang Y, Ohwaki J. J. Appl. Phys., 1993, 74 (2): 1272--1278. [2] Pan Z, Morgan S H, Loper A, et al. J. Appl. Phys., 1995, 77 (9): 4688--4692. [3] Sun H T, Zhang D B, Xu S Q. Chin Phys. Lett, 2004, 21 (9): 1759--1761. [4] Oliverira A S, Araujo M T, Gouveia-Neto A S, et al. J. Appl. Phys, 1998, 83 (1): 604--606. [5] Hehlen M P, Cockfoft N J, Gosnell T R, et al. Opt, Lett., 1997, 22 (11): 772--774. [6] Xu ShiQing, Zhang JunJie, Dai ShiXun, et al. Journal of Inorganic Materials, 2004, 19 (6): 1415--1418. [7] Yang ZhongMin, Zhang QingYuan, Liu YueHui, et al. Acta Phys Sinica, 2005, 54 (5): 2015--2018. [8] Wen Lie, Yang JianHu, Hu LiLi. Acta Phys Sinica, 2004, 53 (12): 4378--4381. [9] Zhang DeBao, Dai NengLi, Qi ChangHong, et al. Acta Optic Sinca, 2003, 23 (4): 505--510. [10] Xu ShiQing, Yang ZhongMin, Wang GuoNian, et al. Acta Optic Sinca, 2004, 24 (8): 1103--1106. [11] Zhang DeBao, Chen BaoYu, Liu ZhuPing, et al. China Journal of Laser, 2005, 32 (1): 110--114. [12] Zheng HaiXing, Wu GuangZhao, Gan FuXi. Acta Phys Sinica, 1985, 34 (12): 1582--1594. [13] Tsuda M, Soga K, Inoue H, et al. J. Appl. Phys., 1999, 85 (1): 29--37. [14] Cheng LiHong, Cao WangHe, Xia Tian. China Journal of Lumin, 2004, 25 (4): 354--358. [15] Judd B R. Phys. Rev., 1962, 127 (3): 750--761. [16] Ofelt G S. J. Chem. Phys., 1962, 37 (3): 511--520. [17] Song F, Zhang G Y, Shang M R, et al. J. Appl. Phys. Lett., 2001, 79 (12): 1748--1750. [18] Wu ChangFeng, Qin GuanShi, Qin WeiPing. Journal of The Chinese Rare Earth Society, 2001, 19 (6): 522--525. [19] Chen BaoJiu, Zhou Wei, Qin WeiPing. China Journal of Lumin, 2001, 22 (4): 43--47. [20] Huang L H, Liu X R, Xu W, et al. J. Appl. Phys., 2001, 90 (8): 5550--5553. |
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