Switching behaviour of ferroelectric liquid crystals probed by optical second-harmonic generation |
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| Authors: | YG Fokin TV Murzina OA Aktsipetrov S Soria G Marowsky |
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| Institution: | (1) Department of Physics, Moscow State University, Moscow 119899, Russia, RU;(2) Laser-Laboratorium Goettingen e.V., Hans-Adolf-Krebs-Weg 1, 37077 Goettingen, Germany, DE |
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| Abstract: | Ferroelectric properties of thin (1.5–4 μm planar cells of a ferroelectric liquid crystal (FLC) mixture are studied using
electro-optic measurements, second-harmonic generation (SHG) and SHG interferometry. A switching behaviour of the FLC cells
in external dc electric fields is observed. It is characterised by rotation of the polarisation plane of the transmitted light
and by changes in the SHG intensity, phase and anisotropy dependences, which are attributed to a collective motion of the
system as a ferroelectric uniform state with C2 symmetry.
Received: 16 October 2001 / Revised version: 18 March 2002 / Published online: 6 June 2002 |
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| Keywords: | PACS: 61 30 Gd 42 65 Ky 77 80 D |
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