纳米Ag薄膜增强Er^(3+)/Yb^(3+)共掺Al_2O_3薄膜上转换发光特性研究  

Enhancement of Up-Conversion Fluorescence Characteristics of Er^(3+)/Yb^(3+) Co-Doped Al_2O_3 Coatings with Ag Nanofilm

作　　者：任锦华[1] 郑明扬 沈杰[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《真空科学与技术学报》2017年第6期616-622,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点基础研究发展规划项目(2012CB934303);国家自然科学基金项目(61671155)

摘　　要：采用射频磁控溅射在石英基底上制备Al_2O_3:Er^(3+)/Yb^(3+)薄膜,在其表面采用直流磁控溅射沉积纳米Ag薄膜。上转换发光测试表明在491和678 nm的发射峰出现了5.8倍和5.2倍的增强。X射线衍射、原子力显微镜以及透射﹑吸收和散射光谱表明:491 nm发射增强主要源于局域表面等离子或表面等离子与发射带的共振耦合辐射机制,而678 nm发射增强主要源于纳米Ag膜对荧光的LSP散射机制。Theimpact of the top Ag nanofilms,grown by DC magnetron sputtering on the surfaces of the Er^（3＋）/Yb^（3＋）co-doped Al_2O_3 coatings pre-deposited by RF magnetron sputtering on quartzsubstrate,on the improvement of the up-conversion fluorescence behavior was investigatedwith X-ray diffraction,atomic force microscopy,transmittance/scattering/absorption spectroscopy. The results show that the top Ag nanofilm significantly enhanced the emission at491 nm and 678 nm by 5. 8 and 5. 2 times respectively. We proposed that the emission enhancement at 491 nm may originate from the resonance of the local surface plasmon（ LSP） or the surface plasmon with the emission band; and that the emission enhancement at 678 nm may basically result from the LSP scattered by the Ag nanofilms.

关 键 词：Ag薄膜 Er^3+/Yb^3+共掺Al2O3薄膜 磁控溅射 上转换发光 

分 类 号：O433.2[机械工程—光学工程]