title: Acousto-optic effect in nematic liquid crystals: experimental evidence of an elastic regime.
abstract: We show that the experimental data for the action of ultrasonic waves on homeotropically aligned nematic-liquid-crystal cells reported by Kapustina, in Akust. Zh. 54, 900 (2008) [Acoust. Phys. 54, 778 (2008)] can be explained in the framework of the director-density coupling theory in the regime of low acoustic intensity. This result therefore provides support for the hypothesis that the interaction between sound and nematic liquid crystals is dominated by an elastic energy.
authors.affiliation: Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Avenida Bom Pastor S/N, 55296-901 Garanhuns, PE, Brazil.
authors.forename: Carlindo
authors.initials: C
authors.lastname: Vitoriano