Cholesteric liquid crystals in applied electric fields: structural transformations and applications

Gouram S. Chilaya; G. Hauck; H. D. Koswig; David Sikharulidze

doi:10.1117/12.300001

1 February 1998 Cholesteric liquid crystals in applied electric fields: structural transformations and applications

Gouram S. Chilaya, G. Hauck, H. D. Koswig, David Sikharulidze

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.300001
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The color change electrooptic effect in dual frequency addressable cholesteric liquid crystals (LCs) with an initial planar orientation was investigated. A field induced increase of the pitch was observed for the switching between low and high frequency fields. The investigations allow new conclusions on the origin of blue and red shift observed in an electric field applied parallel to the helix axis. In cholesteric LCs and polymer-dispersed cholesteric LCs with positive dielectric anisotropy, a colored texture with unusual properties was observed for pitch values of P approximately 0.8 micrometers and under certain conditions. This texture appears after the reduction of the electric field during the transition from the homeotropic nematic structure into the cholesteric one. The angular and the electrified dependencies of the spectral characteristics indicate that this state possesses diffractive grating properties. A voltage controlled color shift and a laser beam deflection were investigated.

Citation Download Citation

Gouram S. Chilaya, G. Hauck, H. D. Koswig, and David Sikharulidze "Cholesteric liquid crystals in applied electric fields: structural transformations and applications", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.300001

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available