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EnglishSol-gel waveguides have been realized using a mixture of zirconium and titanium alkoxides with 3-Glycidoxypropyltrimethoxysilane (Glymo) as organic modifier. The molar ratio metal (Ti,Zr)/Glymo was 70/30 in order to obtain a material with high refractive index. Coumarin30 dye was added into the matrix during the synthesis with a concentration 2 x 10(-2) M. optical properties have been investigated by spectroscopic ellipsometry and UV-visible absorption measurements. Crack free 600 runt thick coatings were obtained with refractive index in the range 1.56-1.66, increasing with the Ti-content. Steady-state and time-resolved fluorescence measurements evidenced an almost linear decrease of the Coumarin30 fluorescence efficiency as Ti-content increases. Such a behaviour can be related to an excited state quenching mechanism. (Zr-0.5-Ti-0.5)(70)/Glymo(30) coating could be considered a fair trade-off between wiveguiding performance (n = 1.61; 12 dB/cm) and Coumarin30 fluorescence efficiency. (C) 2008 Elsevier B.V. All rights reserved.
X. Le Guevel, S.S. (2008). Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings. OPTICAL MATERIALS, 31(2), 451-454.
| Tipologia: | Articolo su rivista |
| Citazione: | X. Le Guevel, S.S. (2008). Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings. OPTICAL MATERIALS, 31(2), 451-454. |
| IF: | Con Impact Factor ISI |
| Lingua: | English |
| Settore Scientifico Disciplinare: | Settore CHIM/02 - Chimica Fisica Settore FIS/03 - Fisica della Materia Settore ING-IND/23 - Chimica Fisica Applicata Settore FIS/01 - Fisica Sperimentale |
| Revisione (peer review): | Sì, ma tipo non specificato |
| Tipo: | Articolo |
| Rilevanza: | Rilevanza internazionale |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.optmat.2008.06.009 |
| Stato di pubblicazione: | Pubblicato |
| Data di pubblicazione: | 2008 |
| Titolo: | Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings |
| Autori: | |
| Autori: | X. Le Guevel, S. Schutzmann, L. Stella, F. De Matteis, P. Prosposito, M. Casalboni |
| Appare nelle tipologie: | 01 - Articolo su rivista |
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http://hdl.handle.net/2108/27755
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