Liquid crystal photorefractivity - Towards supra-optical nonlinearity

I. C. Khoo; M. Y. Shih; A. Shishido; P. H. Chen; M. V. Wood

doi:10.1016/S0925-3467(01)00138-0

Liquid crystal photorefractivity - Towards supra-optical nonlinearity

I. C. Khoo, M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

A review of the basic mechanisms of optically induced refractive index modification in liquid crystalline materials is presented. We describe how the use of methyl-red dye or an azobenzene liquid crystal will dramatically enhance the nonlinear optical responses of typical nematic liquid crystals (NLC). The intensity dependent refractive index changes in these materials are characterized by nonlinear coefficients of over 1cm²/W. The principal contributing mechanisms are orientational photorefractivity associated with photo-induced space charge fields, dopant-nematic molecular torque, and order parameter modification caused by trans-cis isomerization of the azo-dopants.

Original language	English (US)
Pages (from-to)	85-90
Number of pages	6
Journal	Optical Materials
Volume	18
Issue number	1
DOIs	https://doi.org/10.1016/S0925-3467(01)00138-0
State	Published - Oct 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering
Spectroscopy
Inorganic Chemistry
Physical and Theoretical Chemistry
Organic Chemistry

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10.1016/S0925-3467(01)00138-0

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title = "Liquid crystal photorefractivity - Towards supra-optical nonlinearity",

abstract = "A review of the basic mechanisms of optically induced refractive index modification in liquid crystalline materials is presented. We describe how the use of methyl-red dye or an azobenzene liquid crystal will dramatically enhance the nonlinear optical responses of typical nematic liquid crystals (NLC). The intensity dependent refractive index changes in these materials are characterized by nonlinear coefficients of over 1cm2/W. The principal contributing mechanisms are orientational photorefractivity associated with photo-induced space charge fields, dopant-nematic molecular torque, and order parameter modification caused by trans-cis isomerization of the azo-dopants.",

author = "Khoo, {I. C.} and Shih, {M. Y.} and A. Shishido and Chen, {P. H.} and Wood, {M. V.}",

note = "Funding Information: This work is supported in part by the Army Research Office and the Joint Services Agile Program. We are indebted to Prof. T. Ikeda of Tokyo Institute of Technology for providing the azobenzene liquid crystal BMAB.",

year = "2001",

month = oct,

doi = "10.1016/S0925-3467(01)00138-0",

language = "English (US)",

volume = "18",

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TY - JOUR

T1 - Liquid crystal photorefractivity - Towards supra-optical nonlinearity

AU - Khoo, I. C.

AU - Shih, M. Y.

AU - Shishido, A.

AU - Chen, P. H.

AU - Wood, M. V.

N1 - Funding Information: This work is supported in part by the Army Research Office and the Joint Services Agile Program. We are indebted to Prof. T. Ikeda of Tokyo Institute of Technology for providing the azobenzene liquid crystal BMAB.

PY - 2001/10

Y1 - 2001/10

N2 - A review of the basic mechanisms of optically induced refractive index modification in liquid crystalline materials is presented. We describe how the use of methyl-red dye or an azobenzene liquid crystal will dramatically enhance the nonlinear optical responses of typical nematic liquid crystals (NLC). The intensity dependent refractive index changes in these materials are characterized by nonlinear coefficients of over 1cm2/W. The principal contributing mechanisms are orientational photorefractivity associated with photo-induced space charge fields, dopant-nematic molecular torque, and order parameter modification caused by trans-cis isomerization of the azo-dopants.

AB - A review of the basic mechanisms of optically induced refractive index modification in liquid crystalline materials is presented. We describe how the use of methyl-red dye or an azobenzene liquid crystal will dramatically enhance the nonlinear optical responses of typical nematic liquid crystals (NLC). The intensity dependent refractive index changes in these materials are characterized by nonlinear coefficients of over 1cm2/W. The principal contributing mechanisms are orientational photorefractivity associated with photo-induced space charge fields, dopant-nematic molecular torque, and order parameter modification caused by trans-cis isomerization of the azo-dopants.

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Liquid crystal photorefractivity - Towards supra-optical nonlinearity

Abstract

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