Fluorescence MDR features of Eu³⁺ doped sol–gel TiO₂ hydrate microspheres

详细信息    查看全文

• 作者：H. Ikari ; K. Okanishi ; M. Tomita ; T. Ishidate
• 关键词：Fluorescence of Eu³⁺ doped microspheres ; Sol– ; gel TiO₂ microspheres ; WGM ; MDR ; QED
• 刊名：Optical Materials
• 出版年：2008
• 出版时间：April 2008
• 年：2008
• 卷：30
• 期：8
• 页码：1323-1326
• 全文大小：212 K

文摘

Single particle fluorescence of Eu³⁺-doped TiO₂ hydrate microsphere formed in sol–gel process has been studied, where TiO₂ hydrate spheres are characterized by the relatively high refractive index of 1.8. Observed fluorescence spectra display a structure that consists of narrow peaks of varying height superimposed on the familiar broadband emission from europium ions. Such emission peaks result from spherical cavity resonances, and resonance mode positions were assigned from Lorenz–Mie theory calculation. We have also directly measured the lifetime of the MDR peaks of the fluorescence spectra from 8-μm diameter Eu³⁺ doped TiO₂ hydrate microsphere.