We show that light-induced modification of the anchoring conditions can lead to an extraordinarily large optical response in dye-doped nematic liquid crystals. The bulk reorientation due to the collective elastic behavior of the liquid crystal is the origin of the nonlinearity, which occurs without a direct optical torque on the molecular director in the bulk. We call this effect SINE (Surface Induced Nonlinear Effect). These results can also explain the origin of the supranonlinear behavior recently observed in the same composites.
Optical Nonlinearities of Liquid Crystals Controlled by Surfaces / Lucchetti, Liana; Lucchetta, Daniele Eugenio; Francescangeli, Oriano; Simoni, Francesco. - 4457:(2001), pp. 1-8. [10.1117/12.447747]
Optical Nonlinearities of Liquid Crystals Controlled by Surfaces
LUCCHETTI, Liana;LUCCHETTA, Daniele Eugenio;FRANCESCANGELI, ORIANO;SIMONI, Francesco
2001-01-01
Abstract
We show that light-induced modification of the anchoring conditions can lead to an extraordinarily large optical response in dye-doped nematic liquid crystals. The bulk reorientation due to the collective elastic behavior of the liquid crystal is the origin of the nonlinearity, which occurs without a direct optical torque on the molecular director in the bulk. We call this effect SINE (Surface Induced Nonlinear Effect). These results can also explain the origin of the supranonlinear behavior recently observed in the same composites.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
