Fast nonlinear optical materials based on ionic liquid crystals and glasses of metal alkanoates

This work presents the analysis of experimental data on studies of optical and nonlinear optical properties of lyotropic ionic liquid crystals of potassium caprylate doped with electrochromic viologen admixtures, and smectic glasses of thermotropic ionic liquid crystals of cobalt alkanoates homologous series (number of carbon atoms in alkanoate chain n = 7, 9, 11) and their multicomponent mixtures. Prior to performing nonlinear optical experiment the optical absorption spectra for all samples were investigated. Laser induced dynamic grating recording under the action of nanosecond laser pulses was realized, observed and analyzed for the proposed absorptive media. It was discovered that studied materials are characterized by cubic optical nonlinearity and have values of cubic nonlinear susceptibility χ(3) and hyperpolarizability γ comparable with the best characteristics of organic dyes. The possible mechanism of nonlinear response in studied systems was considered on the base of obtained data. The nonlinear response mechanism is connected with nonlinear polarization of π-electrons in the field of laser radiation.

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Novel Liquid Crystals - Polymers and Monomers - As Nonlinear Optical Materials

10.21236/ada200075 ◽

1987 ◽

Author(s):

III Griffin ◽

Anselm C.

Keyword(s):

Liquid Crystals ◽

Optical Materials ◽

Nonlinear Optical ◽

Nonlinear Optical Materials

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Bent-core liquid crystals in a route to efficient organic nonlinear optical materials

Journal of Materials Chemistry ◽

10.1039/b923616c ◽

2010 ◽

Vol 20 (15) ◽

pp. 2965 ◽

Cited By ~ 58

Author(s):

Inmaculada C. Pintre ◽

José Luis Serrano ◽

M. Blanca Ros ◽

Josu Martínez-Perdiguero ◽

Ibon Alonso ◽

...

Keyword(s):

Liquid Crystals ◽

Optical Materials ◽

Nonlinear Optical ◽

Nonlinear Optical Materials

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Technique for Measuring Electronic-Based Electro-Optic Coefficients of Ferroelectric Liquid Crystals

MRS Proceedings ◽

10.1557/proc-392-135 ◽

1995 ◽

Vol 392 ◽

Cited By ~ 2

Author(s):

Kenneth E. Arnett ◽

David M. Walba ◽

Joel A. Drewes

Keyword(s):

Liquid Crystals ◽

Optical Materials ◽

Nonlinear Optical ◽

Broad Band ◽

Nonlinear Optical Materials ◽

Nonlinear Susceptibility ◽

Ferroelectric Liquid Crystals ◽

Polar Order ◽

Electro Optic ◽

Coefficient Measurement

AbstractAmong soft organic nonlinear optical materials is a class of recently developed: χ(2)_ enhanced ferroelectric liquid crystals (FLCs). The FLC phase nonlinear susceptibility is enhanced by synthesizing onto the molecules constituting the FLC phase a moiety with an increased hyperpolarizability. The hyperpolarizability of the FLC molecules couples into the permanent, thermodynamically stable, polar order of the FLC phase resulting in a material with an enhanced nonlinear susceptibility. Like other soft organics, the linear and nonlinear optical materials characteristics can be altered by chemical synthesis and mixing.We report on our technique to evaluate the nonlinear optical properties of χ(2)-enhanced FLCs by measuring their high-frequency electro-optic r-coefficients. The technique is broad-band, readily allowing electro-optic coefficient measurement between 100 KHz and 200 MHz. Although the experimental geometry is not conducive for practical device application, it offers a compromise between ease of fabrication and magnitude of nonlinear response. This technique can also be used to evaluate other organic materials such as poled polymers.

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A REVIEW OF NONLINEAR OPTICAL PROPERTIES OF NEMATIC LIQUID CRYSTALS

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863599000217 ◽

1999 ◽

Vol 08 (03) ◽

pp. 305-317 ◽

Cited By ~ 16

Author(s):

I. C. KHOO

Keyword(s):

Optical Properties ◽

Liquid Crystals ◽

Optical Materials ◽

Nonlinear Optical ◽

Response Times ◽

Nematic Liquid Crystals ◽

Nonlinear Optical Materials ◽

Optical Nonlinearities ◽

Practical Application ◽

Application Potential

We present a review of the electronic and non-electronic optical nonlinearities of nematic liquid crystals (NLC), and recently observed nonlinear optical processes. In both the ordered and isotropic phases, NLCs exhibit large optical nonlinearities with response times ranging from picoseconds to milliseconds. The fundamental principles underlying these nonlinearities, their dynamics and practical application potential are discussed. Comparisons are made with other nonlinear optical materials currently being investigated.

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