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journal article·2024-06Open access

Dynamic Hyperspectral Holography Enabled by Inverse‐Designed Metasurfaces with Oblique Helicoidal Cholesterics

Joohoon Kim, Jun‐Hyung Im, Sunae So, Yeongseon Choi, Hyunjung Kang, Bogyu Lim, Minjae Lee, Young‐Ki Kim, Junsuk Rho

Advanced Materials· Volume 36· Issue 24
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Source abstract

Abstract

Abstract Metasurfaces are flat arrays of nanostructures that allow exquisite control of phase and amplitude of incident light. Although metasurfaces offer new active element for both fundamental science and applications, the challenge still remains to overcome their low information capacity and passive nature. Here, by integrating an inverse‐designed‐metasurface with oblique helicoidal cholesteric liquid crystal (ChOH), simultaneous spatial and spectral tunable metasurfaces with a high information capacity for dynamic hyperspectral holography, are demonstrated. The inverse design facilitates a single‐phase map encoding of ten independent holographic images at different wavelengths. ChOH provides precise spectral modulation with narrow bandwidth and wide tunable regime in response to programmed stimuli, thus enabling dynamic switching of the multicolor holography. The results provide simple and generalizable principles for the rational design of interactive metasurfaces that will find numerous applications, including security platform.
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Research context

Nanomaterials

OpenAlex topics: Metamaterials and Metasurfaces Applications · Advanced Antenna and Metasurface Technologies · Advanced Optical Imaging Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Department of Chemical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Graduate School of Artificial Intelligence Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Department of Control and Instrumentation Engineering Korea University Sejong 30019 Republic of Korea

Department of Engineering Chemistry Chungbuk National University Cheongju 28644 Republic of Korea

Department of Chemistry Kunsan National University Gunsan 54150 Republic of Korea

Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

POSCO‐POSTECH‐RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang 37673 Republic of Korea

National Institute of Nanomaterials Technology (NINT) Pohang 37673 Republic of Korea

Funding

National Research Foundation · Korea Evaluation Institute of Industrial Technology

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