Electrohydrodynamic Instability in Cholesteric Liquid Crystals in the Presence of a Magnetic Field

2007 ◽  
Vol 477 ◽  
pp. 67-76 ◽  
Author(s):  
Jong-Hoon Huh
Keyword(s):  
Magnetic Field ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
Electrohydrodynamic Instability

Nonreciprocal localization of light in magnetoactive cholesteric liquid crystals in an external magnetic field

Optik ◽  
2021 ◽  
Vol 247 ◽  
pp. 167927
Author(s):  
A.H. Gevorgyan ◽  
S.S. Golik ◽  
Y.N. Kulchin ◽  
N.A. Vanyushkin
Keyword(s):  
Magnetic Field ◽  
Liquid Crystals ◽  
External Magnetic Field ◽  
Cholesteric Liquid Crystals

On the Field-Induced Cholesteric-Nematic Transition in Cholesteric Liquid Crystals with Homeotropic Boundary Conditions

1983 ◽  
Vol 38 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J. Brokx ◽  
G. Vertogen ◽  
E. W. C. van Groesen
Keyword(s):  
Magnetic Field ◽  
Liquid Crystals ◽  
Boundary Conditions ◽  
Difference Method ◽  
Lagrange Equation ◽  
Helix Axis ◽  
Cholesteric Liquid Crystals ◽  
Director Field ◽  
Fréedericksz Transition ◽  
The Difference

Abstract The influence of homeotropic boundary conditions on the cholesteric-nematic transition is discussed, starting from the assumption that the director field consists of only components perpendicular to the helix axis, which is directed parallel to the boundary planes. Attention is paid to the solution of Cladis and Kléman for the simpler case without magnetic field. Their solution, consisting of regularly spaced line signularities, is derived in another more transparent way. Besides it is shown that even director fields without singularities are possible. The presence of a magnetic field complicates the solution considerably. Now the relevant Euler-Lagrange equation is solved in an approximate way by partly resorting to the difference method. The usefulness of the method is demonstrated by applying this technique to the nematic-cholesteric transition and the Fréedericksz transition in nematics.

The electrohydrodynamic instability in twisted nematic liquid crystals

1994 ◽  
Vol 4 (2) ◽  
pp. 239-252 ◽  
Author(s):  
A. Hertrich ◽  
A. P. Krekhov ◽  
O. A. Scaldin
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electrohydrodynamic Instability ◽  
Twisted Nematic
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