Optical second-harmonic effect of sol-gel inorganic-organic nanocomposites

Communications: Second-order nonlinear optically (NLO) active materials have promising technical applications in optoelectronic devices. A general problem in NLO-active polymeric systems is the decay of orientational order with time. Results are presented which show that using inorganic-organic composite materials produced by the sol-gel process as a rigid matrix for oriented ÷(2) chromophores (Figure) may provide a means of overcoming this problem

Optical second-harmonic effect of sol-gel inorganic-organic nanocomposites

Communications: Second-order nonlinear optically (NLO) active materials have promising technical applications in optoelectronic devices. A general problem in NLO-active polymeric systems is the decay of orientational order with time. Results are presented which show that using inorganic-organic composite materials produced by the sol-gel process as a rigid matrix for oriented ÷(2) chromophores (Figure) may provide a means of overcoming this problem

Combined analysis of the temperature dependences of the fluorescence spectra and images of single molecules in polymer films

In this poster talk we discuss a possibility to realize the combined analysis of the temperature dependences of the zero-phonon line widths and fluorescence images of single molecules in thin polymer films. Such analysis is aimed to obtain the local characteristics of low-temperature vibrational dynamics (individual parameters of quasi-localised low-frequency vibrational modes) in relation to the sample structure

X(2)-active sol-gel inorganic-organic nanocomposites

Various compositions of inorganic-organic composites (ormocers and nanocomposites) have been synthesized and used as matrices for NLO push-pull molecules. It has been shown that dielectric properties and electrical conductivity during the sol-gel transition (curing parallel to corono poling) are the most important factors for obtaining high X(2) efficiencies. With low conductivity system, X(2) values up to 9.7 pm/v have been obtained