2ND-HARMONIC GENERATION IN POLED MOLECULARLY DOPED POLYMER-FILMS - PUSH-PULL BUTADIENES IN POLY(METHYL METHACRYLATE) AND POLYSTYRENE

We report second harmonic generation in a new class of organic materia ls, namely donor-acceptor substituted all-trans butadienes doped in po ly(methyl methacrylate) or polystyrene and oriented by corona poling a t elevated temperatures. Second harmonic measurements were made at roo m temperature. The observed d(33) coefficients are greater than those of potassium dihydrogen phosphate or 4-dimethylamino-4'-nitrostilbene doped in similar polymer matrices. Rotational diffusion coefficients e stimated from the decay characteristics of the second harmonic intensi ty in the polymer films indicate that the polymer matrix plays a major role in stabilizing the dopants in a nonlinear optics conducive envir onment.