Methacrylate polymers containing different molar contents of nonlinear optical (NLO) active molecular segments based on 2-[4-(N-methyl,N-hydroxyethyl-amino)phenylazo]-phenyl-6-nitrobenzoxazole chromophores were synthesized, and their phase behavior and second-order NLO properties were investigated. Polymers containing 6 –17 mol % chromophore segments allowed the preparation of amorphous and optically clear thin films. Some mesomorphic structuration was exhibited by a polymer with 33 mol % chromophoric units. However, this feature did not prevent the possibility of investigating the NLO properties. Nonlinear resonance-enhanced d33 coefficients were determined by second harmonic generation experiments on spin-coated, corona-poled thin films at lambda= 1064 nm. Values ranging from 40 to 60 pm/V were measured with increasing chromophore molar contents.
Synthesis and Nonlinear Optical Properties of Methacrylate Polymers Based on 2-[4-(N-Methyl,N-hydroxyethylamino)phenylazo]-phenyl-6- nitrobenzoxazole Chromophore / Paola, Persico; Centore, Roberto; Augusto, Sirigu; Mauro, Casalboni; Alessia, Quatela; Felice, Sarcinelli. - In: JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY. - ISSN 1099-0518. - STAMPA. - 41:(2003), pp. 1841-1847. [10.1002/pola.10727]
Synthesis and Nonlinear Optical Properties of Methacrylate Polymers Based on 2-[4-(N-Methyl,N-hydroxyethylamino)phenylazo]-phenyl-6- nitrobenzoxazole Chromophore
CENTORE, ROBERTO;
2003
Abstract
Methacrylate polymers containing different molar contents of nonlinear optical (NLO) active molecular segments based on 2-[4-(N-methyl,N-hydroxyethyl-amino)phenylazo]-phenyl-6-nitrobenzoxazole chromophores were synthesized, and their phase behavior and second-order NLO properties were investigated. Polymers containing 6 –17 mol % chromophore segments allowed the preparation of amorphous and optically clear thin films. Some mesomorphic structuration was exhibited by a polymer with 33 mol % chromophoric units. However, this feature did not prevent the possibility of investigating the NLO properties. Nonlinear resonance-enhanced d33 coefficients were determined by second harmonic generation experiments on spin-coated, corona-poled thin films at lambda= 1064 nm. Values ranging from 40 to 60 pm/V were measured with increasing chromophore molar contents.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.