Temperature-Independent Achromatic Liquid-Crystal Grating with Spatially Distributed Twisted-Nematic Orientation
Temperature-Independent Achromatic Liquid-Crystal Grating with Spatially Distributed Twisted-Nematic Orientation
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DOI：
10.1143/apex.5.062501
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发表时间：
2012-06
影响因子：
2.3
通讯作者：
M. Honma;T. Nose
中科院分区：
文献类型：
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作者：
M. Honma;T. Nose
提出了一种电调谐液晶光栅单元，它由一个均匀液晶盒和一个具有空间变化的扭曲液晶（TN）取向域（-π到π）的液晶光栅组成。前者控制斯托克斯参数S3，后者用作对S3高度敏感的TN-LC光栅。我们证明了所提出的TN-LC光栅的独特特性：它是高效的，几乎是消色差的，并具有最小的温度依赖性的衍射特性。这些性质是由于延迟和波长不敏感的偏振旋转性质的一般TN-LC细胞在莫甘的条件下。
We propose an electrically tunable liquid crystal (LC) grating unit consisting of a conventional homogeneous LC cell and an LC grating with spatially varied twisted-nematic (TN) orientation domains (-π to π). The former cell controls the Stokes parameter S3 and the latter functions as a TN-LC grating that is highly sensitive to S3. We demonstrate the unique characteristics of the proposed TN-LC grating: it is highly efficient, is almost achromatic, and has minimal temperature-dependent diffraction properties. These properties are a result of the retardation- and wavelength-insensitive polarization rotation nature of general TN-LC cells under Mauguin's condition.