Optically induced space-charge fields, dc voltage, and extraordinarily large nonlinearity in dye-doped nematic liquid crystals

I. C. Khoo, S. Slussarenko, B. D. Guenther, Min Yi Shih, P. Chen, W. V. Wood

Research output: Contribution to journalArticle

217 Scopus citations

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 μW/cm2, and a refractive-index change coefficient of more than 6 cm2/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.

Original languageEnglish (US)
Pages (from-to)253-255
Number of pages3
JournalOptics Letters
Volume23
Issue number4
DOIs
StatePublished - Feb 15 1998

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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