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Frequency multiplexing with dispersion-engineered elastic metasurfaces.

Geon Lee1, Dongsu Lee2,3, Wonjae Choi4,5

  • 1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea.

Nature Communications
|November 27, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel dispersion-engineered elastic metasurface that tailors elastic wave properties. This passive metasurface converts elastic energy into electrical signals, enabling spectral information extraction for mechanical systems.

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Area of Science:

  • Solid mechanics
  • Metamaterials science
  • Wave physics

Background:

  • Distinguishing elastic wave frequencies is crucial for mechanical system stability.
  • Conventional elastic metasurfaces often require extensive libraries or complex optimization.
  • A passive framework for multiplexing elastic wave information is needed.

Purpose of the Study:

  • To introduce a frequency-multiplexed elastic metasurface using dispersion engineering.
  • To enable frequency-selective wavefront tailoring.
  • To develop a passive design methodology for elastic metasurfaces.

Main Methods:

  • Utilized dispersion engineering to create a frequency-multiplexed elastic metasurface.
  • Derived meta-atom phase profiles from Kirchhoff-Love plate theory, controlled by plate thickness.
  • Integrated the metasurface with a piezoelectric element for energy conversion.

Main Results:

  • The metasurface successfully multiplexes frequency-dependent phase profiles for wavefront tailoring.
  • Plate thickness alone controls phase profiles, simplifying design and eliminating extensive meta-atom libraries.
  • Focused elastic energy is converted to an amplified electrical signal, revealing spectral information.

Conclusions:

  • Presents the first design methodology for a dispersion-engineered elastic metasurface.
  • Overcomes limitations of conventional elastic metasurfaces by encoding multiplex information passively.
  • The proposed metasurface can be integrated into plate-based mechanical systems for advanced applications.