| Abstract |
Erbium-doped photonic materials and structures have been prepared by sol-gel, in the form of silica-hafnia based optical planar waveguides and 1-D photonic bandgap structures consisting of alternating silica and titania layers. The Er3+ ions were found to be sensitive probes of the waveguide glass matrix structure, especially when hafnium-containing nanocrystallites were present, which narrowed and resolved different Stark components in the photoluminescence peaks. In 1-D Fabry-Perot microcavities, on the other hand, 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 of coupled microcavities. (c) 2005 Elsevier B.V. All rights reserved. |
