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Proceedings Paper

Electrohydrodynamic instabilities in freely suspended smectic C films
Author(s): Christian Langer; Ralf Stannarius; Alice Becker; Horst Stegemeyer
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Paper Abstract

Electrohydrodynamic convection in freely suspended smectic films is investigated experimentally by means of reflection polarizing microscopy. A 2D vortex flow is observed when an electric field is applied in the plane of the smectic layers and the electrodes are in contact with the film. This type of convection has been studied in smectic A, nematic and isotropic films before. For the first time we present measurements of the vortex mode in smectic C* films and ferroelectric smectic C*-films. The connective flow within the optically anisotropic smectic C layers can be visualized directly due to the optical textures resulting from the non-uniform c-director field. In ferroelectric smectic C*-films additional director reorientation effects due to the interaction between the applied electric field and the spontaneous polarization are observed.

Paper Details

Date Published: 1 February 1998
PDF: 5 pages
Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.299959
Show Author Affiliations
Christian Langer, Univ. Leipzig (Germany)
Ralf Stannarius, Univ. Leipzig (Germany)
Alice Becker, Univ. of Paderborn (Germany)
Horst Stegemeyer, Univ. of Paderborn (Germany)

Published in SPIE Proceedings Vol. 3318:
Liquid Crystals: Physics, Technology, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski; Jozef Zmija, Editor(s)

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