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13 October 1994 Nonlinear optical (NLO) and luminescent properties of hybrid siloxane-oxide coatings
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Poled hybrid siloxane-oxide coatings synthesized through hydrolysis and condensation of Si(OMe)4 and TDSP precursors leads to SHG values of 10 pm/V. The glass transition temperatures of the hybrid coatings increase with the TMOS content and the thermal curing time. These modifications related to increases in the condensation and crosslinking degree of siloxane and silica species have a strong influence on the relaxation behavior of the NLO chromophores grafted in these hybrid networks. Hybrid organic inorganic nano composites made of metal oxo-polymers (zirconium and neodymium oxo species) linked to siloxane species [(CH3)Si-O3/2] exhibit Nd3+ luminescence properties. At low rare earth concentrations the emission lifetime is mainly governed by some energy transfer processes occurring between the Nd3+ ions. While for higher Nd3+ concentrations the emission lifetime is controlled by Nd-Nd interactions and by an increase of the quenching probability due to the presence of some residual hydroxy groups.
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Clement Sanchez, B. Lebeau, and Bruno Viana "Nonlinear optical (NLO) and luminescent properties of hybrid siloxane-oxide coatings", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994);

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