A review of the recent results of our group in the field of light-induced anchoring and reorientation effects in dye-doped liquid crystals (LCs) is presented. In particular, the phenomena of photoinduced anchoring and permanent reorientation over a polymeric boundary surface of a dye-doped LC cell is reported, both in the isotropic phase and in the orientationally ordered nematic phase. The results have been interpreted microscopically in terms of adsorption and desorption of the dichroic azo-dye (methyl-red) molecules onto the illuminated surface during light irradiation. The model proposed is in agreement with recent results on the dynamic and stable grating formation in methyl-red doped LCs.
Light-induced anchoring and reorientation effects in dye-doped liquid crystals / Francescangeli, Oriano; Lucchetti, Liana; Simoni, Francesco; S., Slussarenko; E., Ouskova; Y., Reznikov; S., Shiyanovskii; J. L., West. - 4799:(2002), pp. 83-95. [10.1117/12.453274]
Light-induced anchoring and reorientation effects in dye-doped liquid crystals
FRANCESCANGELI, ORIANO;LUCCHETTI, Liana;SIMONI, Francesco;
2002-01-01
Abstract
A review of the recent results of our group in the field of light-induced anchoring and reorientation effects in dye-doped liquid crystals (LCs) is presented. In particular, the phenomena of photoinduced anchoring and permanent reorientation over a polymeric boundary surface of a dye-doped LC cell is reported, both in the isotropic phase and in the orientationally ordered nematic phase. The results have been interpreted microscopically in terms of adsorption and desorption of the dichroic azo-dye (methyl-red) molecules onto the illuminated surface during light irradiation. The model proposed is in agreement with recent results on the dynamic and stable grating formation in methyl-red doped LCs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
