Journal ArticleDOI
Nonresonant third-order susceptibility measurements in the nematic liquid crystal K18
John Philip,T. A. Prasada Rao +1 more
TLDR
In this article, a large nonresonant third-order nonlinear susceptibility, X(3) (-ω; ω, 0, 0) was observed in the isotropic phase of a nematic liquid crystal 4′-n-hexyl-4-cyanobiphenyl (K18).Abstract:
We have observed a large nonresonant third-order nonlinear susceptibility, X(3) (-ω; ω, 0, 0) in the isotropic phase of a nematic liquid crystal 4′-n-hexyl-4-cyanobiphenyl (K18). The highest value of X(3) obtained at 632.8 nm is 1.16274×10-18 m2V-2 corresponding to a temperature 29.3°C. The observed second-order pretransitional temperature T* from our measurements is 1.2°C below the first-order nematic to isotropic transition temperature. The dependence of the Kerr constant on (T-T*)-1 is found to be in good agreement with the predictions of the Landau-de Gennes model.read more
Citations
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Liquid-crystal photonic applications
TL;DR: In this article, the use of liquid crystals in different photonic components: optical filters and switches, beam-steering devices, spatial light modulators, integrated devices based on optical waveguiding, lasers, and optical nonlinear components are discussed.
Journal ArticleDOI
Electro-optical Kerr effect of two high birefringence nematic liquid crystals
TL;DR: In this article, a new tolane-base liquid crystal, 4'-heptyl-3-fluoro-4-isothiocyanatotolane (7TOLF), and a biphenyl-base nematogen, 7BF, have been investigated for the first time to determine their electro-optical behavior and third order non-linearity using the static Kerr effect method.
Journal ArticleDOI
Low-power phase conjugation in push–pull azobenzene compounds
TL;DR: Low-power phase conjugation of azobenzene-compound-doped poly(methyl methacrylate) films was studied and it was shown that this kind of polymer has appreciable third-order optical nonlinearity.
Journal ArticleDOI
Synthesis and characterisation of azomethine class thermotropic liquid crystals and their application in nonlinear optics
TL;DR: In this paper, azomethine derivatives were synthesized and their molecular structures were confirmed by nuclear magnetic resonance spectroscopy, Fourier transform infrared (FTI) and ultraviolet-visible spectrography.
References
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Journal ArticleDOI
Third‐order nonlinear optical properties of poly(diphenyl amine) and poly(4‐amino biphenyl), novel processible conducting polymers
TL;DR: In this paper, the authors used degenerate four-wave mixing measurements in solution at 1.064 μm for partially doped states of the soluble, stable, reprocessible conducting polymers poly(4-amino biphenyl) [P(4ABP)] and poly(diphenyl amine) [DPA] whose synthesis and properties were reported earlier.
Journal ArticleDOI
Degenerate four-wave mixing in the isotropic phase of liquid crystals: The influence of molecular structure
TL;DR: In this paper, the authors review the ways in which the molecular characteristics of nematogenic fluids influence the efficiency of degenerate four-wave mixing and illustrate them in experiments on several materials.
Journal ArticleDOI
Degenerate four-wave mixing in solutions of pure and iodine-doped polyphenylacetylene
TL;DR: In this article, the phase conjugation in iodine-doped polyphenylacetylene is reported for the first time, and the third-order nonlinear optical susceptibility is measured in solutions of undoped and iodized polyphenylene by nanosecond degenerate four-wave mixing (DFWM).
Journal ArticleDOI
Electro-optic Kerr effect studies in liquids and binary liquid mixtures.
John Philip,T. A. Prasada Rao +1 more
TL;DR: In this article, the non-resonant part of the static non-linear susceptibility χ(3)1212 (ω 1,−ω1,o,o) in acetonitrile, benzaldehyde, acetophenone, acetone, ethyl methyl ketone, o-nitrotoluene, nitrobenzene, and benzoylchloride are reported.
Journal ArticleDOI
Gain enhancement of a microparticle phase conjugator using moving fringes
Suksang Chang,Takuso Sato +1 more
TL;DR: The possibility of increasing the gain of two- and four-wave mixings in an artificial Kerr medium which consist of spherical microparticles suspended in liquid is shown and the dynamic mechanism of hologram formation in such a medium is utilized in connection with the moving fringe method.
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