Related Experiment Video
Updated: May 18, 2026

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
Published on: September 20, 2017
Director fluctuations in nematic liquid crystals induced by an ultrasonic wave
Caio Sátiro1, Carlindo Vitoriano
1Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Avenida Bom Pastor S/N, 55296-901 Garanhuns, Pernambuco, Brazil.
Abstract:
The director-density coupling theory was formulated with two parameters (u(1) and u(2)) to explain the acousto-optic effect in nematic liquid crystals. The assumption that the director is not able to accompany rapid oscillations of the sound wave, so that it actually couples to the time-averaged interaction, renders it effectively a u(1)-independent theory. In this paper, we investigate a route in which the time average is postponed to the end of the calculation. This approach allows us to derive measurable quantities that depend on both u(1) and u(2).
Related Concept Videos
The Fluid Mosaic Model
Standing Waves in a Cavity

