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

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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Bibliographic Details
Main Authors: Evans, D R, Cook, G, Saleh, M A, Carns, J L, Serak, S, Tabiryan, N
Format: Report
Language:English
Subjects:
ABSORPTION
ANTHRAQUINONE DYE
ANTHRAQUINONES
BACKSCATTERING
BUBBLES
CONTINUOUS WAVE LASERS
CRITICAL OPALESCENCE
DYES
EXPERIMENTAL DESIGN
HELIUM NEON LASERS
ISOTROPISM
LIGHT SCATTERING
LIGHT TRANSMISSION
LIQUID CRYSTALS
MARANGONI EFFECT
MICRO-DOMAINS
NONLINEAR OPTICS
Optics
PE62102F
Physical Chemistry
SRD(SWITCHABLE REVERSED DIFFRACTION)
WUAFRLM08R1000
Online Access:Request full text
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Summary: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. Prepared in collaboration with Universal Technology Corporation, Dayton, OH; UES, Inc., Dayton, OH; General Dynamics Information Technology, Inc., Dayton, OH; and BEAM Engineering for Advanced Measurements Co., Winter Park, FL. Submitted for publication in Molecular Crystals and Liquid Crystal; published in v453, p177-190, 2006.