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Updated: Jun 5, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced
Benjamin C Olbricht1, Philip A Sullivan, Peter C Dennis
1Department of Chemistry, University of Washington, 109 Bagley Hall, Box 351700, Seattle, Washington 98195, USA.
Abstract:
Organic nonlinear electrooptical (ONLO) chromophores must be acentrically ordered for the ONLO material to have electrooptic (EO) activity. The magnitude of the order is characterized by the acentric order parameter, = ½(3 < 0.1). We have extended the method (begun by Graf et al. J. Appl. Phys. 1994, 75, 3335.) based on the absorption of light to determine the centrosymmetric order parameter induced by a poling field on a thin film sample of ONLO material. We find that the order parameters, analyzed by two different methods, are similar and also consistent with theoretical estimates from modeling of the system using coarse-grained Monte Carlo statistical mechanical methods.
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