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Reconfigurable polymer-templated liquid crystal holographic gratings via visible-light recording

Posted on 2020-05-26 - 20:45
Polymer-templated nematic liquid crystal (LC) holographic gratings via visible-light recording are presented in the presence of reactive mesogens (RMs) and rose bengal (RB)/N-phenylglycine (NPG) photoinitiation system. By optimizing the concentration of RMs in the polymer-templated LC gratings, the requirements of washing-out/refilling processes were fulfilled. And the dependence of the first-order diffraction efficiency (DE) on the concentration of RB and NPG molecules was discussed in detail. The polarization-dependency of diffraction properties was investigated in detail. It is revealed that the diffractive behaviors of polymer-templated LC gratings can be dynamically reconfigured by varying temperature or refilling organic solutions with different refractive index (RI). Furthermore, the potential for recording holograms using green light is explored. We expect that the reconfigurable polymer-templated LC gratings fabricated via visible-light interference would provide a facile approach to regulate the diffraction properties of holographic gratings apart from electric field, thus paving a way towards a class of novel anti-counterfeiting devices.

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AUTHORS (6)

Wei-Cheng Luo
Yao-Dong Xu
Guanxiong Yu
Sensen Li
hanying li
Lujian Chen
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