An Accurate Surface Susceptibility Extraction Method for Physical Representation of Electromagnetic Metasurfaces

Spatially dispersive, or nonlocal, metasurfaces are an important class of metasurfaces that can be characterized with angle dependent surface susceptibilities. These surfaces have potential applications in analog computing and space compression. Conventional metasurface characterization techniques fail on spatially dispersive metasurfaces as there are an infinite number of susceptibility representations that will produce the same macroscopic scattering response for a uniform surface. In this work, we propose an updated extraction method that will yield the correct susceptibility representation and demonstrate this method by extracting the susceptibilities of a dielectric slab.