不同激发条件下SiO_2∶Tb^(3+)溶胶-凝胶光波导薄膜玻璃的荧光特性  

Luminescence Properties of SiO_2∶Tb^(3+) Optical Waveguide Film-Glasses by Sol-Gel Process under Different Excitation Conditions

作　　者：侯嫣嫣[1] 林海[1] 杨殿来[1] 马铁成[1] 

机构地区：[1]大连轻工业学院化工与材料学院,辽宁大连116034

出　　处：《中国稀土学报》2005年第S2期38-41,共4页Journal of the Chinese Society of Rare Earths

基　　金：大连市科学技术基金;大连轻工业学院海外引进人才启动基金

摘　　要：采用溶胶-凝胶法,制备了Tb3+掺杂的二氧化硅光波导薄膜和玻璃,采用扫描电子显微镜(SEM)对光波导薄膜层进行了表征。SEM观察结果表明,经三层涂覆的薄膜厚度达到1.5μm,多层涂覆对薄膜厚度的调节作用明显,有利于满足模式传输的要求。测试并研究了溶胶-凝胶玻璃的激发和发射光谱。光谱分析表明,365 nm长波紫外光可有效激发SiO2基质,获得SiO2基质的宽谱带本征发射,同时观察到微弱的Tb3+特征发射峰;250 nm短波紫外光可高效激发Tb3+,获得Tb3+在SiO2基质中的特征发射峰。均匀透明并具有高效可见发光性质的稀土掺杂溶胶-凝胶SiO2薄膜和玻璃在光波导器件研制方面具有良好的应用前景。Tb^(3+)-doped SiO_2 optical waveguide films and glasses were synthesized through a sol-gel route.The thickness of Tb^(3+)-doped SiO_2 optical waveguide films was characterized by scanning electron microscopy(SEM).It is known from the SEM image for the cross section of the film that the three-layer film thickness is about 1.5 μm.And the film thickness may be adjusted through the multilayer spin-coating method,which satisfies with the demands of mode transmission. The excitation and emission spectra of the sol-gel glasses were measured and analyzed.The spectra analysis indicates that SiO_2 hosts are excited efficiently under the long wavelength UV radiation of 365 nm,and the broad intrinsic emission bands of SiO_2 host is gained.Meanwhile,the weak character emission peaks of Tb^(3+) ion were observed.Tb^(3+) ion is excited efficiently under the short wavelength UV radiation of 250 nm,and the character emission peaks of Tb^(3+) ion are gained.The rare-earth-doped sol-gel silicon dioxide optical films and glasses with homogeneous,high transparency and strong visible luminescence indicate a wonderful practical prospect in developing visible optical waveguide devices.

关 键 词：Tb3+离子 溶胶-凝胶 光波导薄膜 荧光光谱 稀土 

分 类 号：TN252[电子电信—物理电子学]