Skip to main content
padlock icon - secure page this page is secure

Modelling zenithal bistability at an isolated edge in nematic liquid crystal cells

Buy Article:

$55.00 + tax (Refund Policy)

In recent experiments we observed bistable switching in devices made with long pitch square gratings on one surface. It was also discovered that the switching in these devices was localized mainly at isolated edges of the square grating profile. In this paper we present an initial study of surface‐induced director configurations at isolated edges of a square profile in the absence of an applied voltage. Our emphasis is on understanding the effect of edge features such as the edge depth and edge inclination in forming stable high and low pre‐tilt states. Models based on a Landau–de Gennes approach were used and solutions were found through numerical simulation using finite element methods; optical response was determined, based on wide angle beam propagation methods. Results from real cells are also presented. Our results show that static defect‐stabilized states exist for a range of isolated edge depths and inclination angles. In particular, a combination of deep edge depths and steep edge inclinations produce stable high and low pre‐tilt director configurations.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Affiliations: Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom

Publication date: 01 June 2006

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more