Abstract
Dyadic Green’s functions for an electric dipole source over an infinite periodic metasurface are obtained using homogenized, nonlocal, anisotropic, generalized sheet-transition conditions. The homogenized Green’s functions can efficiently model near-field point source excitation of typical metasurface structures. The Green’s functions can be decomposed into discrete and continuous spectral components, providing physical insight into the wave dynamics. Several different metasurfaces are considered, and the results are validated by comparison with a full-wave array-scanning method, demonstrating computational efficiency of the proposed homogenized Green’s function approach.
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