Title :
Photorefractive effect in nematic liquid crystals doped with nonlinear optical chromophores
Author :
Jung, Suho ; Mun, Junho ; Yoon, Choon Sup ; Kim, Hyun-Wuk ; Kim, Jong-Duk ; Lee, Kwang-Sup
Author_Institution :
Dept. of Phys., KAIST, Taejon, South Korea
Abstract :
Photorefractive effect in nematic liquid crystals is attributed to reorientation of liquid crystal molecules by light induced space-charge field. In the absence of external field, nematic liquid crystals form domain structure, which is responsible for high threshold voltage. By doping nonlinear optical chromophores into liquid crystals, the threshold voltage could be reduced significantly and the mechanism involved was investigated
Keywords :
molecular reorientation; multiwave mixing; nematic liquid crystals; photorefractive effect; photorefractive materials; space charge; 3-methyl-4-methoxy-4´-nitrostilbene; diffraction efficiency; domain structure; domain walls; fullerene charge generator; high threshold voltage; large external field; light induced space-charge field; molecular reorientation; nematic liquid crystals; nonlinear optical chromophore doped; photorefractive effect; spin coated; Chemical engineering; Cities and towns; Diffraction; Liquid crystal polymers; Liquid crystals; Nonlinear optics; Optical polymers; Photorefractive effect; Physics; Threshold voltage;
Conference_Titel :
Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7105-4
DOI :
10.1109/LEOS.2001.968977
