2024 | Joohoon Kim, Jun-Hyung Im, Sunae So, Yeongseon Choi, Hyunjung Kang, Bogyu Lim, Minjae Lee, Young-Ki Kim, and Junsuk Rho
This paper presents a novel approach to dynamic hyperspectral holography by integrating an inverse-designed metasurface with oblique helicoidal cholesteric liquid crystals (ChOH). The metasurface, designed using inverse design, can store up to ten independent holographic images at different wavelengths in a single device. ChOH, a special type of liquid crystal, provides precise spectral modulation with a narrow bandwidth and wide tunable range, enabling dynamic switching of multicolor holography. The combination of these two components allows for simultaneous spatial and spectral modulation, achieving high information capacity and active operation. The study demonstrates the experimental realization of ten independent holographic images encoded in a single metasurface, which can be switched using changes in electric field (E) and temperature (T). The results highlight the potential of this platform for various applications, including security platforms, due to its high security and flexibility in controlling the operating conditions.This paper presents a novel approach to dynamic hyperspectral holography by integrating an inverse-designed metasurface with oblique helicoidal cholesteric liquid crystals (ChOH). The metasurface, designed using inverse design, can store up to ten independent holographic images at different wavelengths in a single device. ChOH, a special type of liquid crystal, provides precise spectral modulation with a narrow bandwidth and wide tunable range, enabling dynamic switching of multicolor holography. The combination of these two components allows for simultaneous spatial and spectral modulation, achieving high information capacity and active operation. The study demonstrates the experimental realization of ten independent holographic images encoded in a single metasurface, which can be switched using changes in electric field (E) and temperature (T). The results highlight the potential of this platform for various applications, including security platforms, due to its high security and flexibility in controlling the operating conditions.