Sol-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., L.g., Schutzmann, S., Stella, L., DE MATTEIS, F., Prosposito, P., Casalboni, M. (2008). Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings. OPTICAL MATERIALS, 31(2), 451-454 [10.1016/j.optmat.2008.06.009].

Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings

SCHUTZMANN, STEFANO;STELLA, LORENZO;DE MATTEIS, FABIO;PROSPOSITO, PAOLO;CASALBONI, MAURO
2008-01-01

Abstract

Sol-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.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/02 - Chimica Fisica
Settore FIS/03 - Fisica della Materia
Settore ING-IND/23 - Chimica Fisica Applicata
Settore FIS/01 - Fisica Sperimentale
English
Con Impact Factor ISI
Fluorescence efficiency; Optical properties; Sol-gel
X., L.g., Schutzmann, S., Stella, L., DE MATTEIS, F., Prosposito, P., Casalboni, M. (2008). Effect of titania content on the optical properties of dye-doped hybrid sol-gel coatings. OPTICAL MATERIALS, 31(2), 451-454 [10.1016/j.optmat.2008.06.009].
X., Lg; Schutzmann, S; Stella, L; DE MATTEIS, F; Prosposito, P; Casalboni, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/27755
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