Bistability of splay and π twist states in a chiral-doped dual frequency liquid crystal cell

I-An Yao; Chiu-Lien Yang; Chueh-Ju Chen; Jia-Pang Pang; Shih-Fu Liao; Jia-Hsin Li; Jin-Jie Wu
February 2009
Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG
Academic Journal
A bistable liquid crystal cell with splay and π twist stable states is obtained by doping a chiral additive in a splay cell filled with dual frequency liquid crystals. The switching between the two states is achieved by using a sequential waveform of low and high frequencies. The switching mechanisms are proposed by using the backflow effect together with the anisotropic properties of dual frequency liquid crystals. As a result, the two stable states have the superior memory characteristics due to the topological inequivalence.


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