等离子体子
光致发光
量子点
材料科学
纳米结构
光电子学
塞尔效应
拉曼光谱
硅
纳米技术
发光
宽带
光学
自发辐射
物理
激光器
作者
Hiroshi Sugimoto,Shiho Yashima,Kenta Furuta,Asuka Inoue,Minoru Fujii
摘要
Colloidal silicon quantum dots (Si QDs) with a very broad photoluminescence (PL) band are proposed as a probe to monitor the Purcell enhancement in a plasmonic nanostructure. Si QDs placed on an arbitrary plasmonic nanostructure enable us to determine the Purcell enhancement factors in a broad spectral range (600–900 nm). As a proof-of-concept experiment, a layer of Si QDs is spin-coated on gold film-over nanosphere structures, and the Purcell enhancement is quantitatively determined from the analyses of the PL spectra and the decay rates. The method proposed in this work provides a facile approach to quantitatively measure the performance of plasmonic substrates for PL and Raman enhancements.
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