Rare-earth doped photonic crystal microcavities prepared by sol–gel

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• 作者：Rui M. Almeida ; Ana C. Marques ; Aless ; ro Chiasera ; Andrea Chiappini ; Maurizio Ferrari
• 关键词：Photonic bandgap ; Spin coating ; Luminescence ; Reflectivity ; Silica ; Rare-earths in glasses ; Sol– ; gels (xerogels)
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2007
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：1 April 2007
• 卷：353
• 期：5-7
• 页码：490-493
• 文件大小：266 K

摘要

Rare-earth doped photonic materials and structures have been prepared by sol–gel processing, in the form of 1D photonic bandgap multilayer stacks of silica and titania. A significant enhancement of the Er³⁺ emission at ca. 1530 nm occurred when these ions were inserted into Bragg mirrors and microcavities. In Er³⁺/Yb³⁺ co-doped structures, an efficient energy transfer at 980 nm was observed from Yb³⁺ to Er³⁺ when these ions were in close proximity and especially when they were simultaneously present, in the same defect layer, with a 1530 nm photoluminescence enhancement of up to 25 times being observed for excitation at 980 nm, compared to the excitation of the same microcavities samples at 514.5 nm.