Electroabsorption spectroscopy (Stark spectroscopy) was used to characterize the poling process of three guest–host systems containing stilbene, azobenzene, and biphenyl dyes in a polycarbonate matrix. The poling was carried out at room temperature by application of a dc field under simultaneous irradiation of the sample with nonpolarized light. Investigating different types of chromophore permitted evaluation of the influence of a local heating process on the whole poling mechanism. The intensity dependence of the induced polar order of the azobenzene dye was correlated with the rates of optical and thermally induced transitions between <i>cis</i> and <i>trans</i> isomers.
© 1998 Optical Society of America
S. Grossmann, T. Weyrauch, and W. Haase, "Photoelectrical poling of stilbene, biphenyl, and azobenzene dyes in a polycarbonate matrix as studied by electroabsorption spectroscopy," J. Opt. Soc. Am. B 15, 414-420 (1998)