Nonlinear coupling between the mean polarizability % MathType!MTEF!2!1!+- % feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqipu0de9sqqrpepC0xbbL8F4rqqrpepeea0xe9Lq-lc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pf0Firpepe0de9vr0-vr % 0-vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaGqaaiqa-n7aga % qeaaaa!3586! $$ \bar \gamma $$ of molecules and the local-field anisotropy in a liquid crystal and change of the “ % MathType!MTEF!2!1!+- % feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqipu0de9sqqrpepC0xbbL8F4rqqrpepeea0xe9Lq-lc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pf0Firpepe0de9vr0-vr % 0-vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaGqaaiqa-n7aga % qeaaaa!3586! $$ \bar \gamma $$ = const” paradigm

Abstract

1. The effective-polarizability tensor γ , which can be determined from refractometric data with correct allowance for the local field of an optical wave, is an important molecular parameter containing information on the polarization, electronic structure, and conformation of a molecule in a condensed medium and the intermolecular interaction. The information on γ is especially important for liquid crystals as a general model of anisotropic statistically ordered molecular media. However, allowance for the anisotropy of the local-field tensor with components f j = 1 + L j ( e j ‐ 1) for optical waves polarized along ( j = || ) and across ( j = ⊥ ) the director n , where e j = , n j are the refractive indices of the liquid crystal, and L j are the components of the Lorentz tensor, complicates obtaining such information. Owing to the absence of known constraints on the tensor γ in condensed media, the equality (1)