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Horn-like space-coiling metamaterials toward simultaneous phase and amplitude modulation

Author

Listed:
  • Reza Ghaffarivardavagh

    (Boston University)

  • Jacob Nikolajczyk

    (Boston University)

  • R. Glynn Holt

    (Boston University)

  • Stephan Anderson

    (Boston University Medical Campus)

  • Xin Zhang

    (Boston University)

Abstract

Acoustic metasurfaces represent a family of planar wavefront-shaping devices garnering increasing attention due to their capacity for novel acoustic wave manipulation. By precisely tailoring the geometry of these engineered surfaces, the effective refractive index may be modulated and, consequently, acoustic phase delays tuned. Despite the successful demonstration of phase engineering using metasurfaces, amplitude modulation remains overlooked. Herein, we present a class of metasurfaces featuring a horn-like space-coiling structure, enabling acoustic control with simultaneous phase and amplitude modulation. The functionality of this class of metasurfaces, featuring a gradient in channel spacing, has been investigated theoretically and numerically and an equivalent model simplifying the structural behavior is presented. A metasurface featuring this geometry has been designed and its functionality in modifying acoustic radiation patterns experimentally validated. This class of acoustic metasurface provides an efficient design methodology enabling complete acoustic wave manipulation, which may find utility in applications including biomedical imaging, acoustic communication, and non-destructive testing.

Suggested Citation

  • Reza Ghaffarivardavagh & Jacob Nikolajczyk & R. Glynn Holt & Stephan Anderson & Xin Zhang, 2018. "Horn-like space-coiling metamaterials toward simultaneous phase and amplitude modulation," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03839-z
    DOI: 10.1038/s41467-018-03839-z
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    Cited by:

    1. Dongwoo Lee & Beomseok Oh & Jeonghoon Park & Seong-Won Moon & Kilsoo Shin & Sea-Moon Kim & Junsuk Rho, 2024. "Wide field-of-hearing metalens for aberration-free sound capture," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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