| Autor: |
J L, Ferrari, K O, Limal, L J Q, Maia, S J L, Ribeiro, A S L, Gomes, R R, Gonçalves |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Journal of nanoscience and nanotechnology. 11(3) |
| ISSN: |
1533-4880 |
| Popis: |
An Er(3+)-doped SiO2:Ta2O5 optical channel waveguide and nanocomposite were prepared by the sol-gel route at a Si:Ta 50:50 molar ratio. Channels with an excellent surface profile were easily and quickly fabricated by focusing a femtosecond laser onto the surface of multilayered films deposited on SiO2/Si substrates. In parallel, the same sol used to prepare the film was annealed at 900, 1000, and 1100 degrees C for 2 h, to get the nanocomposite materials. A broadband NIR emission around 1538 nm, assigned to the 4I13/2 --4I15/2 transition of the Er3+ ions was observed in the nanocomposites of amorphous SiO2 containing dispersed Ta2O5 nanocrystals. The 4I13/2 lifetime and emission bandwidth depend on the annealing temperature. In conclusion, Er(3+)-doped SiO2:Ta2O5 channel waveguides and nanocomposites are promising materials for photonic applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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