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用溶胶凝胶法制备了Er~(3+)与SnO_2纳米颗粒共掺90%SiO_2-10%TiO_2光学薄膜(折射率~1.50,薄膜厚度~2.78μm)。用X射线衍射和TEM研究了烧结后溶胶凝胶材料中纳米颗粒的物相、颗粒形状与大小,表明生成的颗粒为金红石结构、大小约4 nm的SnO_2纳米晶。讨论了薄膜的红外光谱,并通过棱镜耦合采用导光模式测试了板式平面波导中Er~(3+)离子的荧光光谱,讨论了存在纳米颗粒对Er~(3+)离子发光的影响,结果显示由于薄膜中存在纳米晶而使Er~(3+)离子发光强度有近10倍的增强。
Er 3+ and SnO 2 nanoparticles were doped with 90% SiO 2 -10% TiO 2 optical films (refractive index ~ 1.50, film thickness ~ 2.78 μm) by sol-gel method. The phase and particle size and size of the nanoparticles in the sol-gel material were investigated by X-ray diffraction and TEM. The results show that the resulting particles are SnO2 nanocrystals with a size of about 4 nm. The infrared spectra of the films were discussed. The fluorescence spectra of Er 3+ ions in the planar waveguide were analyzed by prism coupling and the effects of the nanoparticles on the luminescence of Er 3+ ions were discussed. The results It is shown that the luminescence intensity of Er ~ (3+) ions is almost 10 times higher than that of Er 3+ ions due to the presence of nanocrystals in the films.