Physical Review A
The results of direct measurements of the principal indices of refraction in the smectic-A and smectic-C phases of two homologous liquid crystals are reported. These results are compared qualitatively with the orientational model of Straley and with a model based on anisotropic nematic fluctuations due to coupling between orientational and translational order.
Lockhart, Thomas E.; Allender, David W.; Gelerinter, Edward; and Johnson, David L. (1979). Investigation of the Indexes of Refraction Near the Smectic-A Smectic-C Transition: Orientational Order. Physical Review A 20(4), 1655-1660. Retrieved from http://digitalcommons.kent.edu/phypubs/83