Reconfigurable polymer-templated liquid crystal holographic gratings via visible-light recording
| Autor: | Han-Ying Li, Sen-Sen Li, Yao-Dong Xu, Wei-Cheng Luo, Guan-Xiong Yu, Lujian Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Diffraction
Materials science business.industry Holography 02 engineering and technology Green-light 021001 nanoscience & nanotechnology Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics Interference (communication) Liquid crystal law 0103 physical sciences 0210 nano-technology business Refractive index Visible spectrum |
| Zdroj: | Optics express. 28(12) |
| ISSN: | 1094-4087 |
| Popis: | 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 systems. By optimizing the concentration of RMs in the polymer-templated LC gratings, the template after being washed out can be refilled with suitable fluidic components. 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 also investigated. 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. |
| Databáze: | OpenAIRE |
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