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Refractive Indices, Order Parameter and Optical Transmittance Studies of a Nematic Liquid Crystal Mixture

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Singh A., Manohar R., Shukla J., Biradar A.

Acta Physica Polonica A

2006

vol. 110

issue 4

485-493

Measurements of ordinary refractive index, birefringence, density, and order parameter were made on a technologically important nematogen and the data obtained for its nematic and isotropic phase were reported. A modified wedge method was used for the measurement of the birefringence (δ n). The nematic-isotropic phase transition temperature matches very well as is exhibited from the value of refractive indices and densities obtained using different techniques. The optical anisotropy and density data were used to determine the order parameter and principal polarizability of the nematic mixture using the Vuks approach and their temperature dependence was discussed. The macroscopic order parameter was obtained and compared with microscopic order parameter. These two values agree very well.

Electro-Optical Behavior of Dye Doped Nematic Liquid Crystal

100%

Yadav S., Pandey K., Misra A., Manohar R.

Acta Physica Polonica A

2011

vol. 119

issue 6

824-828

We report electro-optical behavior of a dye doped nematic liquid crystal. The dye doped cells have shown some improvement in some parameters important for the display devices such as threshold voltage (V_{th}), splay elastic constant, rotational viscosity and response time. The suppression of screening effect improves the threshold voltage for the doped sample.

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2 Acta Physica Polonica A

1 2011

1 2006

2 Manohar R.

1 Biradar A.

1 Misra A.

1 Pandey K.

1 Shukla J.

1 Singh A.

1 Yadav S.

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Refractive Indices, Order Parameter and Optical Transmittance Studies of a Nematic Liquid Crystal Mixture

Electro-Optical Behavior of Dye Doped Nematic Liquid Crystal