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Rare-earth photoluminescence in sol–gel derived confined glass structures
Institution:1. Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA;2. Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA
Abstract:The characteristics of rare-earth luminescence in selected sol–gel derived confined structures have been examined. Erbium and erbium/ytterbium doped photonic materials and structures have been prepared by sol–gel processing, in the form of silicate optical planar waveguides, modified with titania and hafnia, and 1-D photonic bandgap structures consisting of multilayer stacks of silica and titania. The Er3+ ions were found to be sensitive probes of the waveguide glass matrix structure, especially when hafnia-containing nanocrystallites were present, which narrowed and resolved different Stark components of the photoluminescence peaks. In 1-D Fabry–Perot coupled microcavities, efficient energy transfer was observed from Yb3+ to Er3+ ions when these were present simultaneously in the same defect layer, but not when the two types of ions were isolated in separate defect layers.
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