Abstract
We investigated the effects of pretilt angle and d/ p on the stability of bistable chiral-tilted homeotropic nematic (BHN) liquid crystal (LC) devices by experiments and simulation. The stability and experimental phenomena of BHN LC devices can be explained explicitly by calculating the free energies of the devices. Among the three BHN LC device varieties, (0,2π), (-π/2,3π/2), and (π/2,5π/2), the former two varieties are truly bistable devices in the high pretilt angle regime. However, the π/2 and 5π/2 states of the (π/2,5π/2) BHN LC device will always relax to the intermediate 3π/2 twisted state. We also analyze the energy barriers between the two stable states of (0,2π) and (-π/2,3π/2) BHN LC devices.
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