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Uniform rotation of smectic layers of a ferroelectric liquid crystal in an asymmetric electric field.
Uniform rotation of smectic layers of a ferroelectric liquid crystal in an asymmetric electric field.
- Source :
-
JETP Letters . 6/10/98, Vol. 67 Issue 11, p978. 7p. - Publication Year :
- 1998
-
Abstract
- An asymmetric ac electric field with amplitude E = 10 V/ µm gives rise to a matched rotation of the normal to the smectic layers, while a sinusoidal field E = 1 V/ µm is used to study the rotation in the method of modulation total internal reflection ellipsometry, which makes it possible to probe the region of a ferroelectric liquid crystal (FLC) next to the electrode (h ≈ 0.7 µm). It is shown that the angle of rotation of the normal to the smectic layers near the surface of the electrode varies reversibly as a function of the polarity and number of electric pulses applied, just as in the interior region. The characteristic dynamic properties of thin layers of nematic liquid crystals, such as an anomalously long relaxation time and a high-frequency relaxation process, are observed in thin FLC layers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LIQUID crystals
*SMECTITE
*FERROELECTRIC thin films
*ELECTRIC fields
Subjects
Details
- Language :
- English
- ISSN :
- 00213640
- Volume :
- 67
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- JETP Letters
- Publication Type :
- Academic Journal
- Accession number :
- 7320922