New Phenomena in Dye-Doped Liquid Crystals: Black Hole Effect and Switchable Reversed Diffraction

A nonlinear extinction of transmitted light is observed in liquid crystal cells with large concentrations of anthraquinone dye. Two distinct mechanisms are responsible for this effect when exposed to low and high intensity light, respectively. At low intensities, critical opalescence, micro-scatter,...

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Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2006-09, Vol.453 (1), p.177-190
Main Authors: Evans, D. R., Cook, G., Saleh, M. A., Carns, J. L., Serak, S., Tabiryan, N.
Format: Article
Language:English
Subjects:
anthraquinone dye
bubbles
critical opalescence
light scattering
liquid crystals
Marangoni effect
micro-domains
nonlinear transmission
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creator Evans, D. R.
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description A nonlinear extinction of transmitted light is observed in liquid crystal cells with large concentrations of anthraquinone dye. Two distinct mechanisms are responsible for this effect when exposed to low and high intensity light, respectively. At low intensities, critical opalescence, micro-scatter, and an increase in linear absorption occur; whereas high intensities result in scattering from photo-induced micro-bubbles.
doi_str_mv 10.1080/15421400600654058
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subjects anthraquinone dye
bubbles
critical opalescence
light scattering
liquid crystals
Marangoni effect
micro-domains
nonlinear transmission
title New Phenomena in Dye-Doped Liquid Crystals: Black Hole Effect and Switchable Reversed Diffraction
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