Related Experiment Video
Updated: Aug 4, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Mean-field theory of acentric order of dipolar chromophores in polymeric electro-optic materials
1Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA.
Abstract:
A mean-field theory of macroscopic order of dipolar chromophores in a polymer matrix in the presence of an external electric field is developed. The theory is applied to characterize the electro-optic coefficient of the Pockel effect that forms the basis for a variety of polymeric nonlinear electro-optic materials. The coefficient is studied as a function of chromophore concentration, polymer properties, and manufacturing conditions, including temperature, strength of the applied electric field, and macroscopic shape of the sample. The model reproduces the observed behavior of the electro-optic coefficient and explains the nonlinear concentration dependence of the coefficient at high chromophore concentrations. Specific recommendations for system design are suggested from the analysis of the obtained data.
More Related Videos
Related Concept Videos
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
π Electron Effects on Chemical Shift: Overview
Electric Dipoles and Dipole Moment
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
Induced Electric Dipoles
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Potential Due to a Polarized Object

