Design of Interactive Metahologram via Liquid Crystallinity
- Title
- Design of Interactive Metahologram via Liquid Crystallinity
- Authors
- 김원식; 최진강; 최예나; 임준형; KIM, YOUNGKI
- Date Issued
- 2022-04-21
- Publisher
- United Scientific Group
- Abstract
- The arrays of subwavelength-scaled nanostructures on a surface, often called metasurfaces, have made advances in flat optics because of their potential to display programmable hologram and miniaturize optical components. Because previous metasurface systems are passive, however, their practical applications have been impeded. Accordingly, recent efforts have focused on the realization of active metasurfaces that can switch holograms upon triggers via using, for example, phase-change materials, mechanical actuations, and chemical reactions. Nevertheless, the full potential of active metasurface system has yet to be realized due to the limitation of previous approaches, including limited design of nanostructures, complex fabrication process, and slow response.
Here, we propose a simple and versatile design rule to enable dynamically tunable metahologram systems by leveraging the optical anisotropic and stimuli-responsive nature of liquid crystals (LCs). We demonstrate the new class of active metahologram, a thin layer of LC integrated with multiplexing metasurface, to autonomously sense a programmed stimulus (e.g., electric field, temperature, pressure, toxic gas) and dynamically switch the holographic images [1,2,3]. These attribute provides insight into the rational design of interactive meta-hologram display that enable their full potential of multifunctional active devices. This work was supported by the Korea National Research Foundation (NRF-2021R1A4A1030944 & 2021R1A2C2095010).
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/115264
- Article Type
- Conference
- Citation
- International Conference on Materials Science & Engineering, 2022-04-21
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