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Formation of binary phase gratings in photopolymer-liquid crystal composites by a surface-controlled anisotropic phase separation

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5 Author(s)
Park, Jae-Hong ; 216 Electrical Engineering East, Pennsylvania State University, University Park, Pennsylvania 16802 ; Khoo, I.C. ; Yu, Chang-Jae ; Jung, Min-Sik
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We report on formation of binary phase gratings in photopolymer-liquid crystal (PLC) composites using a surface-controlled phase separation method. The binary nature of the PLC phase gratings is produced by employing a single step photo-ablation through an amplitude photomask which precisely controls the interfacial interactions between the LC and the photopolymer on the alignment layer. A subsequent illumination of the ultraviolet light onto the whole PLC promotes an anisotropic phase separation resulting in the formation of distinct binary patterns for the PLC structure. The electrically tunable diffraction properties of the binary phase gratings are presented.

Published in:

Applied Physics Letters  (Volume:86 ,  Issue: 2 )

Date of Publication:

Jan 2005

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