Journal ArticleDOI
Nonresonant third-order susceptibility measurements in the nematic liquid crystal K18
John Philip,T. A. Prasada Rao +1 more
Reads0
Chats0
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
More filters
Journal ArticleDOI
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
More filters
Journal ArticleDOI
A high-voltage pulse measuring system based on the Kerr effect
John Philip,T. A. Prasada Rao +1 more
TL;DR: In this paper, the performance of a high-voltage pulse measuring system based on the Kerr effect is investigated with benzoyl chloride, o-nitrotoluene, acetophenone, acetonitrile, benzaldehyde and ethyl methyl ketone along with nitrobenzene and acetone that are well known.
Journal ArticleDOI
Polarisation and material dependence of degenerate four-wave mixing transients in molecular fluids
TL;DR: In this article, the contributions of various microscopic mechanisms to the nonlinear optical response of molecular fluids are analyzed for the case of degenerate four-wave mixing on the nanosecond timescale.
Journal ArticleDOI
An apparatus for quantitative measurements of the optical Kerr effect
A D Buckingham,J H Williams +1 more
TL;DR: In this paper, an apparatus for the measurement of the optical Kerr effect in liquid samples is described and the authors show how more accurate, reproducible results could be obtained with continuous-wave lasers and how the inherent problems of thermal defocusing effects can be overcome.
Proceedings ArticleDOI
Electrooptic And Third Harmonic Generation Studies Of Polymer Alloys And Solutions
TL;DR: In this article, the authors measured the linear polarizability along the dipole moment direction using the Kerr effect and found a good correlation with the first hyper-polarizability.
Journal ArticleDOI
Nonresonant third order susceptibility measurements in a nematic liquid crystal‐PCH‐5
John Philip,T. A. Prasada Rao +1 more
TL;DR: In this paper, the real part of the third order nonlinear susceptibility χ(3) above the nematic to isotropic phase transition temperature of a nematic liquid crystal 4 (trans‐4'−4'n'n−pentylcyclohexy)‐benzonirtile (PCH‐5) from electro-optic Kerr effect experiments was determined.
Related Papers (5)
Nematic-Isotropic Transition: Thermal Hysteresis and Magnetic Field Effects
T Riste,L Dobrzynski +1 more