title: Optically induced space-charge fields, dc voltage, and extraordinarily large nonlinearity in dye-doped nematic liquid crystals.
abstract: We have observed extraordinarily large optical nonlinearity in Methyl Red-doped nematic liquid-crystal film. Grating diffraction can be generated with an optical intensity as low as 40 microW/cm(2) , and a refractive-index change coefficient of more than 6 cm(2)/ W is obtained. The effect is attributed to formation of an optically induced dc space-charge field and to the resulting reorientation of the highly birefringent nematic director axis.
authors: I C
authors: IC
authors: Khoo
authors: S
authors: S
authors: Slussarenko
authors: B D
authors: BD
authors: Guenther
authors: M Y
authors: MY
authors: Shih
authors: P
authors: P
authors: Chen
authors: W V
authors: WV
authors: Wood