Flexoelectric switching in a bistable nematic device

A.J. Davidson, N.J. Mottram

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

We present a continuum theory meodel of switching in a bistable nematic crystal device. The bistability of the device investigated relies on the fact that one of the cell surfaces exhibits two stable anchoring states, that is, two surface director orientations are locally stable. Since the other surface exhibits monostable, homeotropic anchoring there are two possible ground state dorector orientatins within the cell, depending on the director orientation at the bistable surface. We first investigate the stability of these base states and find a critical surface anchoring strength below which only on e of the states is stable. We also investigate the process of switching between the two stable states through the application of an electric field and the presence of a flexoelectric effect and may hinder switching. We find, therefore, that a window of possible field strengths exists within which switching occurs.
LanguageEnglish
Pages051710
JournalPhysical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume65
Issue number5
DOIs
Publication statusPublished - 2002

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Bistability
Cell
cells
Ground State
field strength
Electric Field
Continuum
Crystal
continuums
ground state
electric fields
crystals

Keywords

  • flexoelectric switching
  • nematics
  • continuum theory
  • bistability
  • electric fields

Cite this

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Flexoelectric switching in a bistable nematic device. / Davidson, A.J.; Mottram, N.J.

In: Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics , Vol. 65, No. 5, 2002, p. 051710.

Research output: Contribution to journalArticle

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AU - Mottram, N.J.

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AB - We present a continuum theory meodel of switching in a bistable nematic crystal device. The bistability of the device investigated relies on the fact that one of the cell surfaces exhibits two stable anchoring states, that is, two surface director orientations are locally stable. Since the other surface exhibits monostable, homeotropic anchoring there are two possible ground state dorector orientatins within the cell, depending on the director orientation at the bistable surface. We first investigate the stability of these base states and find a critical surface anchoring strength below which only on e of the states is stable. We also investigate the process of switching between the two stable states through the application of an electric field and the presence of a flexoelectric effect and may hinder switching. We find, therefore, that a window of possible field strengths exists within which switching occurs.

KW - flexoelectric switching

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KW - electric fields

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