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Proceedings Paper

Simulation of a cholesteric blue phase in a thin cell: exotic defect structures and their response to an electric field
Author(s): Jun-ichi Fukuda; Slobodan Zumer
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Paper Abstract

We present our numerical attempts to simulate the structures of a cholesteric blue phase (BP) confined in a thin cell. Our simulations are based on a Landau-de Gennes theory describing the orientational order of the liquid crystal by a second-rank symmetric tensor. When the cell thickness is small enough, of the order of the lattice constant of the bulk BP a, various exotic defect structures that do not resemble those of bulk BPs are shown to be stable. They include a hexagonal lattice of Skyrmion excitations, and arrays of disclination lines in a double-helix form. We also show the dynamics of disclination lines in a thicker cell (~ 2.6 a) under an applied electric field. The cell before the application of an electric field accommodates disclination lines of the form similar to that of bulk BP. The electric field alters their form in a non-trivial way depending on the field strength.

Paper Details

Date Published: 10 February 2012
PDF: 6 pages
Proc. SPIE 8279, Emerging Liquid Crystal Technologies VII, 82790V (10 February 2012); doi: 10.1117/12.912825
Show Author Affiliations
Jun-ichi Fukuda, National Institute of Advanced Industrial Science and Technology (Japan)
Slobodan Zumer, Univ. of Ljubljana (Slovenia)
Jozef Stefan Institute (Slovenia)

Published in SPIE Proceedings Vol. 8279:
Emerging Liquid Crystal Technologies VII
Liang-Chy Chien, Editor(s)

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