Ferrari, J. L.Lima, K. O.Maia, L. J. Q.Ribeiro, Sidney José Lima [UNESP]Gomes, A. S. L.Goncalves, R. R.2014-05-202014-05-202011-03-01Journal of Nanoscience and Nanotechnology. Stevenson Ranch: Amer Scientific Publishers, v. 11, n. 3, p. 2540-2544, 2011.1533-4880http://hdl.handle.net/11449/40580An Er-doped SiO(2):Ta(2)O(5) 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 SiO(2)/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 4 vertical bar(13/2)-> 4 vertical bar(15/2) transition of the Er(3+) ions was observed in the nanocomposites of amorphous SiO(2) containing dispersed Ta(2)O(5) nanocrystals. The 4 vertical bar(13/2) lifetime and emission bandwidth depend on the annealing temperature. In conclusion, Er(3+)-doped SiO(2):Ta(2)O(5) channel waveguides and nanocomposites are promising materials for photonic applications.2540-2544engBroadband NIR EmissionSol-Gel Er(3+)-Activated SiO(2)-Ta(2)O(5) Glass CeramicChannel WaveguidesArtigo10.1166/jnn.2011.3565WOS:000288102300105Acesso restrito64460474630346540000-0003-3286-9440