3D05 PBLG液晶における電場反転とパターン形成 : 初期過程の理論

概要

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A unique stripe pattern or banded texture appears in a liquid crystalline solution of rod-like polymer PBLG, sandwiched between two parallel glass plates, when the direction of an in-plane electric field already applied along say-x axis is suddenly reversed to +x direction, the orientation of director in the stripe domain being perpendicular to +x direction. We here present a theoretical analysis of the initial stage of the pattern formation, and show that the modulated structure of the electric polarization is a natural consequence of the tendency for the polarization having a large relaxation time to reduce the electrostatic energy in the course of its rotation towards the final direction of +x axis. It is shown in particular that wave length of the modulation (stripe structure) is determined by the competition between the electrostatic self-energy of the component of the polarization perpendicular to the applied electric field and the energy of the curvature elasticity. The growth equation for the modulation amplitude is also derived.
日本液晶学会の論文
2001-09-24