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首页> 外文期刊>Applied optics >Recording of polarization holograms in a liquid crystal cell with a photosensitive chalcogenide orientation layer [Invited]
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Recording of polarization holograms in a liquid crystal cell with a photosensitive chalcogenide orientation layer [Invited]

机译：在带有感光硫属化物取向层的液晶盒中记录偏振全息图[已邀请]

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摘要

Polarization gratings have been recorded in a combined liquid crystal (LC) cell made of a substrate covered with a photosensitive chalcogenide orientation layer and a reference substrate covered with a rubbed polyimide film. The gratings are formed due to the spatially modulated light-induced easy orientation axis on the chalcogenide surface recorded by two beams with opposite circular polarizations. The gratings are permanent, but they can be erased by one of the recording beams and re-recorded. The diffraction intensity of the circularly polarized light is achromatic and does not depend on the birefringence of the LC. The diffraction efficiency of the grating is of the order of a few percents. Application of an ac field causes a strong increase of the diffraction efficiency up to 45%.
机译：偏振光栅已经记录在组合液晶（LC）单元中，该液晶单元由覆盖有光敏硫属化物取向层的基板和覆盖有摩擦的聚酰亚胺膜的参考基板组成。光栅是由于在硫属化物表面上由空间调制的光诱导的易取向轴形成的，该硫轴由具有相反圆偏振的两个光束记录。光栅是永久性的，但是可以被记录光束之一擦除并重新记录。圆偏振光的衍射强度是消色差的，并且不依赖于LC的双折射。光栅的衍射效率约为百分之几。施加交流场会导致衍射效率大幅提高，最高可达45％。

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