Liquid Crystal Diffraction Grating Made by Flow Induced Method
Huang-Ming Philip Chen
|關鍵字:||液晶;光柵;反應型液晶;流動;排列;聚合物;毛吸;配向;繞射;Liquid Crystal;Grating;Reactive Mesogen;Flow;Orientation;Polymer;Capillary;Alignment;Diffraction|
Liquid crystal Diffraction Gratings can be applied for beam splitting and electrically tuning. It was widely used in optical communication, spectrometer and projection display technologies. In this thesis, a novel method different from the traditional fabrication is proposed. We made use of a photo-reactive mesogen and utilized the physic property of free flowing nematic liquid crystal. The molecular orientation without alignment layer was acquired. After photo-polymerization, the order of the orientation was locked. Anisotropic polymer gratings, then, were formed. The LC material that can be driven by electric fields was filled into the polymer grating and then a tunable LCPG was obtained. The Grating is free from the limitation caused by fringing field effect. Therefore, the period of grating can be reduced and the field of application will expand.
|Appears in Collections:||Thesis|
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