Ferroelectric Liquid Crystals

Blinov, L. M.; Chigrinov, Vladimir G.

doi:10.1007/978-1-4612-2692-5_7

Cited by 17 publications

(8 citation statements)

References 136 publications

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“…One of the most significant molecular factors determining the nature of the liquid crystalline phases is the magnitude of the permanent dipole moment and its orientation relative to the major axis of the molecule [43][44][45]. Nematogens that possess permanent dipole moments are more attractive for S.M.…”

Section: Resultsmentioning

confidence: 99%

Molecular and Electronic Structure on n-Alkyl Cyanobiphenyl Nematogens

Risser

Ferris

2002

Molecular Crystals and Liquid Crystals

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First principle electronic structure calculations (ab initio and density functional) were performed on a series of substituted cyanobiphenyls to examine the structural and electronic properties as a function of the alkyl tail length and changes in torsion angle about the central bond connecting the rings. We find good agreement between our results and previous electronic structure studies for the optimized torsion angle between phenyls in the cyanobiphenyls, and changes in dipole moment for the cyanobiphenyls. We also find the torsion angle and rotational barriers in cyanobiphenyls to be similar to that in simple biphenyl. However, we find large discrepancies with the recent density functional calculations, which reported a much smaller torsion angle in the cyanobiphenyls.

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Section: Resultsmentioning

confidence: 99%

Molecular and Electronic Structure on n-Alkyl Cyanobiphenyl Nematogens

Risser

Ferris

2002

Molecular Crystals and Liquid Crystals

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“…The output wave form is now used to determine the response time. The response time of FLCs has been evaluated using τ = (t 90 − t 10 )/1.8 [17][18][19][20], where t 90 and t 10 are the time taken by the output wave form to reach 90% and 10% of the maximum of the output wave form.…”

Section: Electro-optical Measurementmentioning

confidence: 99%

Dielectric and electro-optical parameters of two ferroelectric liquid crystals: a comparative study

Misra¹,

Srivastava²,

Shukla³

et al. 2008

Phys. Scr.

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Dielectric relaxation and an electro-optical study of two ferroelectric liquid crystals having different spontaneous polarizations (Felix 16/100 and Felix 17/000) showing SmC* and SmA phases have been performed in the temperature range 30–80 ∘C. The experimental data have been used to determine different relaxation parameters, viz. distribution parameter, relaxation frequency, dielectric strength and rotational viscosity. The Goldstone mode of dielectric permittivity has been well observed for both the samples under investigation. The activation energy of both the samples has also been determined by the best theoretical fitting of the Arrhenius plot. We have also evaluated the optical response time and anchoring energy coefficients from electro-optical measurement techniques for these samples.

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“…The largest electro-optical coefficient: ∆n/V ~ 0.1 V -1 [1]; 2. The largest nonlinear optical coefficient: ∆n/I ~ 10 cm 2 /W [2] 3.…”

Section: Introductionmentioning

confidence: 99%

Electro- and nonlinear optics of liquid crystal materials with nanoparticulate internal structure

et al. 2003

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The combination of liquid crystals (LCs) and reconfigurable nanoparticulate networks results in most versatile materials for controlling light beams. These material systems can be used for developing multi-functional reconfigurable photonics and opto-electronics components and spatial light modulators with ultimate light modulating capabilities. We review here our results in laser recording of one and two-dimensional diffraction gratings and gratings with variable pitch. Nonlinear optical properties of LC with nanoparticulate internal networks and diffraction gratings laser-recorded in these materials are discussed. Nanoparticulate networks are capable of stabilizing the thermodynamic relaxation of photoinduced cis-isomers of molecules in photosensitive azobenzene LCs used as host for the nanoparticulate network leading to bistability of the phase state (anisotropic and isotropic) of the material, and reversible all-optical switching between those states.

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Ferroelectric Liquid Crystals

Cited by 17 publications

References 136 publications

Molecular and Electronic Structure on n-Alkyl Cyanobiphenyl Nematogens

Molecular and Electronic Structure on n-Alkyl Cyanobiphenyl Nematogens

Dielectric and electro-optical parameters of two ferroelectric liquid crystals: a comparative study

Electro- and nonlinear optics of liquid crystal materials with nanoparticulate internal structure

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