resumo
The application of spectroscopic ellipsometry for the characterization of UV-patterned channel waveguides to obtain the refractive index contrast and surface deformation profile is presented. Thin films were prepared with organic-inorganic di-ureasils hybrids modified with zirconium tetra-propoxide deposited in silica on silicon substrates. The channel waveguides were produced by direct writing using UV laser radiation. The refractive index contrast and the surface ablation induced by the UV optical signal were estimated by ellipsometry being 4.5 x 10(-3) and 30.5 nm, respectively. The deepness of the surface ablation due to the UV exposition was also estimated by atomic force microscopy measurements that pointed out a value of 31.0 +/- 1.0 nm, concordant with the ellipsometric calculations. The near-field intensity technique was used as a support for contextualizing the proposed ellipsometry method for the characterization of refractive index profiles. The estimated refractive index contrast (2.0 x 10(-3)) is in a good agreement with the refractive index contrast derived from ellipsometry.
palavras-chave
ORGANIC-INORGANIC HYBRIDS
categoria
Engineering; Optics; Telecommunications
autores
Fernandes, VR; Vicente, CMS; Pecoraro, E; Karpinsky, D; Kholkin, AL; Wada, N; Andre, PS; Ferreira, RAS
nossos autores
Andrei Kholkin
Investigador Principal
Carlos Miguel Santos Vicente
Bolseiro de pós-Doutoramento
Dzmitry Karpinski (Karpinsky)
Bolseiro de pós-Doutoramento
Maria Rute de Amorim e Sá Ferreira André
Professor CatedráticoProjectos
agradecimentos
This work was supported by Fundacao para a Ciencia e a Tecnologia, FEDER, COMPETE under Grant PTDC/CTM/72093/2006, Grant PTDC/CTM/101324/2008, Grant SFRH/BD/41943/2007, and COST Action MP0702.