Effect of Temperature on the Refractive Indices of Liquid Crystals and Validation of a Modified Four-Parameter Model

• Authors: K. Thingujam , S. Sarkar , B. Choudhury , A. Bhattacharjee
• Languages of publication: EN

Abstracts

EN

The variation of refractive indices with temperature of three pure nematogenic compounds 5OCB, CPHB and 6CHBT were studied experimentally using thin prism technique. The refractive indices n_{o} and n_{e} were measured using 633 nm lines from a He-Ne laser. A modified four-parameter model was taken which is based on the Vuks equation describing the effect of temperature on the refractive indices of liquid crystals. In this paper we report the variation of refractive indices of these three liquid crystals with temperature, using the thin prism method. The variation in birefringence was determined experimentally. The variation in refractive indices and birefringence were also fitted theoretically using the modified Vuks equation. On comparison, the theoretically fitted values show close agreement with the experimental values.

Keywords

EN

78.15.+e; 78.20.Fm; 64.70.M-

Discipline

• 78.20.Fm: Birefringence
• 78.15.+e: Optical properties of fluid materials, supercritical fluids and liquid crystals(for reactions in supercritical fluids, see 82.33.De)
• 64.70.M-: Transitions in liquid crystals

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 4
• Pages: 754-757

Dates

published

2012-10

received

2012-02-22

(unknown)

2012-08-10

Contributors

author

K. Thingujam

• Department of Physics, NIT Silchar, Assam - 788010, India

author

S. Sarkar

• Department of Physics, NIT Silchar, Assam - 788010, India
• Department of Physics, Karimganj College, Karimganj, Assam - 788710, India

author

B. Choudhury

• Department of Physics, NIT Silchar, Assam - 788010, India

author

A. Bhattacharjee

• Department of Physics, NIT Silchar, Assam - 788010, India

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Identifiers

DOI

10.12693/APhysPolA.122.754