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Area of Science:

  • Physics
  • Materials Science
  • Wave Phenomena

Background:

  • Metamaterials and metasurfaces offer precise control over wave scattering.
  • Current designs focus on deterministic scattering manipulation.
  • Controlling the probability of scattering in specific angular ranges remains a challenge.

Purpose of the Study:

  • To propose and demonstrate a controllable random metasurface.
  • To engineer the probability and angular distribution of scattering (scattering cloud).
  • To explore novel applications in wave manipulation.

Main Methods:

  • Designing a metasurface with a combined gradient and random coding sequence.
  • Introducing a novel low-interference coding particle.
  • Utilizing fast Fourier transform for theoretical calculations and validation.

Main Results:

  • Arbitrary engineering of the direction and size of the scattering cloud.
  • Demonstration of controllable random scattering probabilities.
  • High consistency between experimental results and theoretical predictions.

Conclusions:

  • The proposed controllable random metasurface enables precise control over scattering cloud phenomena.
  • The developed coding particle design minimizes interference, enhancing performance.
  • This work opens avenues for diverse applications in electromagnetic and acoustic wave manipulation.