We report the observation of orientational gratings induced by the photorefractive effect in dye-doped polymer-dispersed liquid crystals. The photorefractive origin of the grating-induction effect is supported by the results of two-beam coupling experiments and by the possibility of erasing the grating by uniform illumination. For all the samples a stable memory effect was observed.
© 1998 Optical Society of America
G. Cipparrone, A. Mazzulla, and F. Simoni, "Orientational gratings in dye-doped polymer-dispersed liquid crystals induced by the photorefractive effect," Opt. Lett. 23, 1505-1507 (1998)