title: Photorefractivity of poly-N-vinylindole-based materials as compared with that of poly-N-vinylcarbazole-based blends.
abstract: The asymmetric two-beam coupling technique has been employed to measure the photorefractivity of thin films of polymer blends containing 2,5-dimethyl-4-(p-nitrophenylazo)anisole as the nonlinear optical component. Poly-(1-vinylindole) and poly-(2,3-dimethyl-1-vinylindole) were the photoconductive polymer counterparts. The values of the photorefractivity are reported. It appears that they are comparable with those of similar blends based on the well-known poly-(9-vinylcarbazole) (PVK), here considered as a reference standard. Careful differential scanning calorimetry analyses have been accomplished on the different blends taken into account to rationalize the significantly longer shelf lifetime of the indolyl-based films with respect to the PVK-based blends.
authors.affiliation: Istituto per i Processi Chmico-Fisici, Consiglio Nazionla delle Ricerche, Pisa, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Angiuli
authors.forename: Francesco
authors.initials: F
authors.lastname: Ciardelli
authors.forename: Arturo
authors.initials: A
authors.lastname: Colligiani
authors.forename: Francesco
authors.initials: F
authors.lastname: Greco
authors.forename: Annalisa
authors.initials: A
authors.lastname: Romano
authors.forename: Giacomo
authors.initials: G
authors.lastname: Ruggeri
authors.forename: Elpidio
authors.initials: E
authors.lastname: Tombari