Ladak, S. and Davidson, A.J. and Brown, C.V. and Mottram, N.J. (2009) Sidewall control of static azimuthal bistable nematic alignment states. Journal of Physics D: Applied Physics, 42 (8). pp. 85114-85121. ISSN 0022-3727
Stable azimuthal alignment states have been created in the plane of a homogeneous layer of nematic liquid crystal by the action of one or more sawtooth sidewalls. The alignment states in devices with two sawtooth sidewall structures, either in-phase or in anti-phase, and with one sawtooth wall opposite a flat wall have been investigated as a function of the sawtooth pitch. The optical textures of the observed states are in excellent agreement with the predictions of nematic Q-tensor theory. The frequencies of occurrence of the different states are broadly consistent with the expected inverse correlation with the Q-tensor predictions for their energy.
Actions (login required)