Photoinduced surface relief grating on composite film of conducting polymer and polyacrylate containing azo-substituent

The formation of a photoinduced surface relief grating on a composite film of conducting polymer with a rigid main chain structure and an acrylate polymer containing azo-substituent with a soft main chain structure has been studied, The diffraction efficiency of the photoinduced surface relief grating decreases with increasing concentration of conducting polymer with respect to the polyacrylate in the concentration range higher than 3 mol%. It has been found, however, that the formation of the surface relief grating is promoted by a slight doping of the conducting polymer (<3 mol%) and progresses even after terminating the laser light irradiation on the composite film. An anomalous angular dependence of photoluminescence from the composite film with a surface relief grating on it has also been observed.