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Electrically tunable photo-aligned two-dimensional liquid crystal polarisation grating |
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| Authors: | Song-zhen Li Zhi-Wei Zhao Cheng-Miao Wang Qi-dong Wang Lishuang Yao |
| Institution: | 1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, China;2. School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, China |
| Abstract: | Two-dimensional liquid crystal polarisation grating based on twist liquid crystal has been demonstrated and fabricated by polarisation holography in this paper. The maximal diffraction efficiency of the second order is up to 90%. And the two-dimensional liquid crystal polarisation grating has the properties of electrically tenability and polarisation tenability. The two-dimensional polarisation grating diffracts light into a spot array. Different direction diffraction light is with different polarisation states. The intensity of the different orders diffraction light is optically controlled. |
| Keywords: | Polarisation grating multi-beams liquid crystals electrically tunable |