Elsevier, Journal of Non-Crystalline Solids, 5-7(353), p. 490-493
DOI: 10.1016/j.jnoncrysol.2006.10.015
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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. 1530nm occurred when these ions were inserted into Bragg mirrors and microcavities. In Er3+/Yb3+ co-doped structures, an efficient energy transfer at 980nm 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 1530nm photoluminescence enhancement of up to ∼25 times being observed for excitation at 980nm, compared to the excitation of the same microcavities samples at 514.5nm.