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All-optical geometric image transformations enabled by ultrathin metasurfaces

Author

Listed:
  • Xingwang Zhang

    (The Pennsylvania State University)

  • Xiaojie Zhang

    (The Pennsylvania State University)

  • Yao Duan

    (The Pennsylvania State University)

  • Lidan Zhang

    (The Pennsylvania State University)

  • Xingjie Ni

    (The Pennsylvania State University)

Abstract

Image processing plays a vital role in artificial visual systems, which have diverse applications in areas such as biomedical imaging and machine vision. In particular, optical analog image processing is of great interest because of its parallel processing capability and low power consumption. Here, we present ultra-compact metasurfaces performing all-optical geometric image transformations, which are essential for image processing to correct image distortions, create special image effects, and morph one image into another. We show that our metasurfaces can realize binary image transformations by modifying the spatial relationship between pixels and converting binary images from Cartesian to log-polar coordinates with unparalleled advantages for scale- and rotation-invariant image preprocessing. Furthermore, we extend our approach to grayscale image transformations and convert an image with Gaussian intensity profile into another image with flat-top intensity profile. Our technique will potentially unlock new opportunities for various applications such as target tracking and laser manufacturing.

Suggested Citation

  • Xingwang Zhang & Xiaojie Zhang & Yao Duan & Lidan Zhang & Xingjie Ni, 2023. "All-optical geometric image transformations enabled by ultrathin metasurfaces," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43981-x
    DOI: 10.1038/s41467-023-43981-x
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    1. Saman Jahani & Sangsik Kim & Jonathan Atkinson & Justin C. Wirth & Farid Kalhor & Abdullah Al Noman & Ward D. Newman & Prashant Shekhar & Kyunghun Han & Vien Van & Raymond G. DeCorby & Lukas Chrostows, 2018. "Controlling evanescent waves using silicon photonic all-dielectric metamaterials for dense integration," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    2. Xianzhong Chen & Lingling Huang & Holger Mühlenbernd & Guixin Li & Benfeng Bai & Qiaofeng Tan & Guofan Jin & Cheng-Wei Qiu & Shuang Zhang & Thomas Zentgraf, 2012. "Dual-polarity plasmonic metalens for visible light," Nature Communications, Nature, vol. 3(1), pages 1-6, January.
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