Birefringence and Frederiks effect in a cubic liquid crystal

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Abstract
Experiments show that the existing nematic liquid crystals are uniaxial with the continuous group symmetry. The existence of liquid crystals possessing a discrete group symmetry — for instance, the cubic group symmetry — is not forbidden. The most probable candidates for this class of compounds are so-called smectics D which do not show optic anisotropy. The question arises of how to distinguish experimentally a cubic liquid crystal from an isotropic liquid In this work the anisotropic Kerr effect is proposed for this purpose

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