LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF CARBAZOLE-CONTAINING POLYMERS

Acceptor-substituted carbazole derivatives were newly designed as novel nonlinear optical materials to improve physical properties of poled polymers. Various 3,6- and 9-substituted carbazole derivatives were investigated systematically in terms of second harmonic generation activity in crystalline state and nonlinear optical responses in poled polymers. Enhancement of molecular polarizability was achieved by introducing electron-withdrawing groups in 3 and/or 6-positions. Main chain polymers with head-to-tail configuration of carbazole moieties were designed and the enhancement factor of second-order nonlinear optical susceptibility was elucidated from the studies of monomer and dimer model compounds.