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

doi:10.1364/OL.23.000253

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

Materials Research Institute (MRI)

Research output: Contribution to journal › Article

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 language	English (US)
Pages (from-to)	253-255
Number of pages	3
Journal	Optics Letters
Volume	23
Issue number	4
DOIs	https://doi.org/10.1364/OL.23.000253
State	Published - Feb 15 1998

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OL.23.000253

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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.",

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AU - Khoo, I. C.

AU - Slussarenko, S.

AU - Guenther, B. D.

AU - Shih, Min Yi

AU - Chen, P.

AU - Wood, W. V.

PY - 1998/2/15

Y1 - 1998/2/15

N2 - 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.

AB - 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.

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