Dhara, Surajit ; Araoka, Fumito ; Lee, Mongryong ; Le, Khoa Van ; Guo, Lingfen ; Sadashiva, B. K. ; Song, Kigook ; Ishikawa, Ken ; Takezoe, Hideo (2008) Kerr constant and third-order nonlinear optic susceptibility measurements in a liquid crystal composed of bent-shaped molecules Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 78 (5). ISSN 1539-3755
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Official URL: https://doi.org/10.1103/PhysRevE.78.050701
Related URL: http://dx.doi.org/10.1103/PhysRevE.78.050701
Abstract
We report the determination of the Kerr constant (B) and the real part of the third-order nonlinear optic susceptibility (X(3)) above the nematic-isotropic phase transition temperature (TNI) of a liquid crystal composed of bent-shaped molecules. The values of B and X(3) just above (∼0.3°C) TNI are ∼8×10-12m/V2 and 5×10-20m2/V2, respectively. The estimated critical temperature T*C is about 1.5°C below TNI indicating that the nematic-isotropic (NI) transition is weakly first order as in the case of calamitic liquid crystals. The temperature-dependent Kerr constant is found to be in good agreement with the predictions of the Landau–de Gennes theory. The experimental results are compared with those in a calamitic liquid crystal material with negative dielectric anisotropy in the nematic phase
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 141352 |
| Deposited On: | 01 Dec 2025 07:05 |
| Last Modified: | 01 Dec 2025 07:05 |
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