Three-dimensionally modulated anisotropic structure for diffractive optical elements created by one-step three-beam polarization holographic photoalignment
Three-dimensionally modulated anisotropic structure for diffractive optical elements created by one-step three-beam polarization holographic photoalignment
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DOI：
10.1063/1.4944810
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发表时间：
2016-03
影响因子：
3.2
通讯作者：
Kotaro Kawai;M. Sakamoto;Kohei Noda;T. Sasaki;N. Kawatsuki;H. Ono
中科院分区：
文献类型：
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作者：
Kotaro Kawai;M. Sakamoto;Kohei Noda;T. Sasaki;N. Kawatsuki;H. Ono
采用高效的一步光对准方法制备了一种具有三维液晶(LC)取向结构的衍射光学元件，用于先进的偏振光束控制。这项研究具有重要的意义，因为用三束偏振干涉光束同时照射由两个未对准的光交联型聚合物液晶膜组成的空玻璃池，可以在两个取向膜上产生不同的二维连续和复杂的取向图案。得到的LC栅衍射光的偏振方位角、椭圆度和旋转方向随入射光束的二维衍射位置和偏振态的不同而变化很大。基于琼斯微积分的理论分析很好地解释了这些偏振衍射特性。
A diffractive optical element with a three-dimensional liquid crystal (LC) alignment structure for advanced control of polarized beams was fabricated by a highly efficient one-step photoalignment method. This study is of great significance because different two-dimensional continuous and complex alignment patterns can be produced on two alignment films by simultaneously irradiating an empty glass cell composed of two unaligned photocrosslinkable polymer LC films with three-beam polarized interference beam. The polarization azimuth, ellipticity, and rotation direction of the diffracted beams from the resultant LC grating widely varied depending on the two-dimensional diffracted position and the polarization states of the incident beams. These polarization diffraction properties are well explained by theoretical analysis based on Jones calculus.