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Functional metamirrors using bianisotropic elements.

V S Asadchy1,2, Y Ra'di1, J Vehmas1

  • 1Department of Radio Science and Engineering, Aalto University, P.O. Box 13000, FI-00076 Aalto, Finland.

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|March 21, 2015
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Summary
This summary is machine-generated.

Researchers developed metamirrors, artificial surfaces offering full-power reflection control. These metamirrors enable advanced antenna designs across the electromagnetic spectrum.

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Area of Science:

  • Metamaterials
  • Electromagnetics
  • Optics

Background:

  • Conventional mirrors follow the law of reflection, reflecting plane waves as plane waves.
  • Engineering reflected wave phase typically requires shaping reflectors or adding phase-correcting elements.

Purpose of the Study:

  • To demonstrate full-power reflection with controlled phase using a single-layer array of subwavelength inclusions.
  • To introduce the concept of metamirrors as versatile artificial reflecting surfaces.

Main Methods:

  • Theoretical analysis and experimental validation of a single-layer array of deeply subwavelength inclusions.
  • Engineering independent forward and backward scattering of inclusions using electric and magnetic polarizability.

Main Results:

  • Achieved full-power reflection with arbitrary control over the reflected wave phase.
  • Demonstrated that the metamirror array exhibits desired reflecting properties within a specific frequency band and transparency at others.
  • Proved the feasibility of independent scattering control using polarizable inclusions.

Conclusions:

  • Metamirrors offer a novel approach to manipulating reflected waves, surpassing limitations of conventional mirrors.
  • The proposed metamirror technology enables diverse applications, including advanced antennas for satellite, radio astronomy, telecommunications, and integrated optics.