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Area of Science:

  • Electromagnetics
  • Materials Science
  • Nanotechnology

Background:

  • Inhomogeneous metasurfaces, arrays of supercells with diverse particles, offer enhanced bandwidth for various applications.
  • Analyzing metasurfaces with substrates is crucial due to their common presence and influence on performance.
  • Existing methods may lack efficiency or accuracy when dealing with complex substrated inhomogeneous metasurfaces.

Purpose of the Study:

  • To present an efficient and accurate method for analyzing plane-wave scattering by inhomogeneous substrated metasurfaces.
  • To validate the proposed method against full-wave simulations for diverse metasurface configurations.
  • To demonstrate the method's utility in designing advanced electromagnetic devices, such as wideband absorbers.

Main Methods:

  • Developed an Interaction Constant Method (ICM) for analyzing inhomogeneous substrated metasurfaces.
  • Calculated total effective polarizability tensors using individual particle polarizabilities and analytical interaction coefficients.
  • Validated the method by comparing calculated reflectance and transmittance with full-wave electromagnetic simulations.

Main Results:

  • The ICM accurately predicts the electromagnetic response of inhomogeneous substrated metasurfaces.
  • The method demonstrates time efficiency due to analytical calculation of interaction constants.
  • Successful application in analyzing a wideband terahertz absorber design.

Conclusions:

  • The proposed Interaction Constant Method is a significant advancement for the analysis and design of inhomogeneous substrated metasurfaces.
  • The method offers a time-effective and accurate approach for various particle arrangements and array periods.
  • This work facilitates the development of novel metasurface-based devices across different applications.