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Dispersion-engineered metasurfaces reaching broadband 90% relative diffraction efficiency

Author

Listed:
  • Wei Ting Chen

    (Harvard University)

  • Joon-Suh Park

    (Harvard University)

  • Justin Marchioni

    (Harvard University
    University of Waterloo)

  • Sophia Millay

    (Harvard University
    Department of Physics, Williams College)

  • Kerolos M. A. Yousef

    (Harvard University)

  • Federico Capasso

    (Harvard University)

Abstract

Dispersion results from the variation of index of refraction as well as electric field confinement in sub-wavelength structures. It usually results in efficiency decrease in metasurface components leading to troublesome scattering into unwanted directions. In this letter, by dispersion engineering, we report a set of eight nanostructures whose dispersion properties are nearly identical to each other while being capable of providing 0 to 2π full-phase coverage. Our nanostructure set enables broadband and polarization-insensitive metasurface components reaching 90% relative diffraction efficiency (normalized to the power of transmitted light) from 450 nm to 700 nm in wavelength. Relative diffraction efficiency is important at a system level – in addition to diffraction efficiency (normalized to the power of incident light) – as it considers only the transmitted optical power that can affect the signal to noise ratio. We first illustrate our design principle by a chromatic dispersion-engineered metasurface grating, then show that other metasurface components such as chromatic metalenses can also be implemented by the same set of nanostructures with significantly improved relative diffraction efficiency.

Suggested Citation

  • Wei Ting Chen & Joon-Suh Park & Justin Marchioni & Sophia Millay & Kerolos M. A. Yousef & Federico Capasso, 2023. "Dispersion-engineered metasurfaces reaching broadband 90% relative diffraction efficiency," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38185-2
    DOI: 10.1038/s41467-023-38185-2
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    References listed on IDEAS

    as
    1. M. Ossiander & Y.-W. Huang & W. T. Chen & Z. Wang & X. Yin & Y. A. Ibrahim & M. Schultze & F. Capasso, 2021. "Slow light nanocoatings for ultrashort pulse compression," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    2. M. Ossiander & Y.-W. Huang & W. T. Chen & Z. Wang & X. Yin & Y. A. Ibrahim & M. Schultze & F. Capasso, 2021. "Author Correction: Slow light nanocoatings for ultrashort pulse compression," Nature Communications, Nature, vol. 12(1), pages 1-1, December.
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    Cited by:

    1. Xiaoyan Zhou & Hongtao Wang & Shuxi Liu & Hao Wang & John You En Chan & Cheng-Feng Pan & Daomu Zhao & Joel K. W. Yang & Cheng-Wei Qiu, 2024. "Arbitrary engineering of spatial caustics with 3D-printed metasurfaces," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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