OPTICALLY INDUCED SPACE-CHARGE FIELDS, DC VOLTAGE, AND EXTRAORDINARILY LARGE NONLINEARITY IN DYE-DOPED NEMATIC LIQUID-CRYSTALS

Authors
KHOO IC SLUSSARENKO S GUENTHER BD SHIH MY CHEN P WOOD WV
Citation
Ic. Khoo et al., OPTICALLY INDUCED SPACE-CHARGE FIELDS, DC VOLTAGE, AND EXTRAORDINARILY LARGE NONLINEARITY IN DYE-DOPED NEMATIC LIQUID-CRYSTALS, Optics letters, 23(4), 1998, pp. 253-255
Citations number
15
Categorie Soggetti
Optics
Journal title
Optics letters → ACNP
ISSN journal
01469592
Volume
23
Issue
4
Year of publication
1998
Pages
253 - 255
Database
ISI
SICI code
0146-9592(1998)23:4<253:OISFDV>2.0.ZU;2-Z
Abstract
We have observed extraordinarily large optical nonlinearity in Methyl Red-doped nematic liquid-crystal film. Grating diffraction can be gene rated with an optical intensity as low as 40 mu W/cm(2), and a refract ive-index change coefficient of more than 6 cm(2)/W is obtained. The e ffect is attributed to formation of an optically induced de space-char ge field and to the resulting reorientation of the highly birefringent nematic director axis. (C) 1998 Optical Society of America.