Spontaneous formation of horizontal chevrons in smectic-C[sup *] liquid crystals

Strangi, G.; Coleman, D. A.; Maclennan, J. E.; Copic, M.; Clark, N. A.
March 2001
Applied Physics Letters;3/12/2001, Vol. 78 Issue 11, p1532
Academic Journal
We report an unusual structural formation observed in surface-stabilized ferroelectric liquid crystal cells with asymmetrically treated surfaces of 3-Glycidoxypropyl trimethoxysilane and nylon. On cooling the material W415 from the smectic-A[sup *] to the smectic-C[sup *] phase, the bookshelf smectic layers spontaneously rearrange to form a horizontal chevron structure, manifested optically as a periodic texture of uniform stripes. The polarization is perpendicular to the boundary plates and reverses direction from stripe to stripe, while the director is oriented in the plane of the cell and alternates symmetrically about the stripe direction. In an applied field the cells show a V-shaped (analog) electro-optic response. © 2001 American Institute of Physics.


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