Hybrid organic-inorganic materials doped with zwitterionic push-pull chromophores with high hyperpolarizability have been synthesized by a sol-gel procedure. A large chromophore concentration was reached by using N-(hydroxyethyl)carbazole as a physical spacer (preventing the dye aggregation). Spain-coated doped films were electrically poled and second harmonic generation measurements performed in situ. During the thermally assisted polling under a N-2 atmosphere,only the carbazole molecules degraded. Second-harmonic generation measurements gave an estimation of the nonlinear-coefficient, r(33), of 38 pm V-1 at 1064 nm.
Brusatin, G., Abbotto, A., Beverina, L., Pagani, G., Casalboni, M., Sarcinelli, F., et al. (2004). Poled sol-gel materials with heterocycle push-pull chromophores that confer enhanced second-order optical nonlinearity. ADVANCED FUNCTIONAL MATERIALS.
Poled sol-gel materials with heterocycle push-pull chromophores that confer enhanced second-order optical nonlinearity
CASALBONI, MAURO;
2004-01-01
Abstract
Hybrid organic-inorganic materials doped with zwitterionic push-pull chromophores with high hyperpolarizability have been synthesized by a sol-gel procedure. A large chromophore concentration was reached by using N-(hydroxyethyl)carbazole as a physical spacer (preventing the dye aggregation). Spain-coated doped films were electrically poled and second harmonic generation measurements performed in situ. During the thermally assisted polling under a N-2 atmosphere,only the carbazole molecules degraded. Second-harmonic generation measurements gave an estimation of the nonlinear-coefficient, r(33), of 38 pm V-1 at 1064 nm.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
