Citation:

Novel metasurface phase-modulation mechanism


  • Light: Science & Applications  10, Article number: (2021)
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  • Corresponding author:
    Qinghua Song (song.qinghua@sz.tsinghua.edu.cn)
  • Received: 25 August 2021
    Accepted: 25 August 2021
    Published online: 14 September 2021

doi: https://doi.org/10.1038/s41377-021-00629-z

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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Novel metasurface phase-modulation mechanism

  • Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
  • Corresponding author:

    Qinghua Song, song.qinghua@sz.tsinghua.edu.cn

doi: https://doi.org/10.1038/s41377-021-00629-z

  • Science, 373(6559), 1133–1137, (2021)

    https://doi.org/10.1126/science.abj3179

    The past few years have witnessed exciting developments in non-Hermitian physics, showing unconventional phenomena and unique features associated with exceptional points (EPs). EPs exist in many open systems, leading to a spectral singularity. The research team from CNRS-CRHEA in France collaborating with the University of California, Berkeley in US utilizes the topological feature around an EP to introduce a novel design in metasurface to achieve a new wavefront phase encoding technique. They show that the intriguing polarization response of singular plasmonic meta-atoms encircling an EP leads to 2π-phase modulation on a chosen outgoing channel, which is topologically protected by the EP. In auxiliary, combining the exceptional topological phase with Pancharatnam-Berry phase, they achieve arbitrary wavefront engineering on cross polarization channels independently. Their breakthrough explorations not only provide a new degree of freedom to address optical phase in a full 2π range, but also open the way to a new class of optical and photonic applications.

Conflict of interest
  • The author declares no competing interests.

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