| Abstract |
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 similar to 25 times being observed for excitation at 980 nm, compared to the excitation of the same microcavities samples at 514.5 nm. (c) 2007 Elsevier B.V. All rights reserved. |
