The temperature dependence of the anchoring energy threshold of FLC cells with weak surface anchoring *
Max Planck Research Group, Liquid Crystalline Systems at Martin
Luther University, Mühlpforte 1, 06108 Halle/S., Germany
Accepted: 6 November 1996
The switching properties of a short pitch chiral smectic-C liquid-crystal film in bookshelf orientation were studied. Transient-bistable switching was observed in the smectic-C phase over a broad temperature range. The threshold voltage for transient-bistable switching Uth was strongly dependent on the applied pulse width and on the temperature. The anchoring energy threshold W0 for bistable switching varies within the experimental error linearly with temperature and changes its sign at a critical temperature Tcrit of about , where no bistable switching could be observed. Above Tcrit an electric field induces texture changes, which were investigated using polarizing microscopy.
PACS: 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 42.65.Pc – Optical bistability, multistability, and switching / 42.79.Kr – Display devices, liquid-crystal devices
© EDP Sciences, 1996