Multipolar Modeling of Spatially Dispersive Metasurfaces

There is today a growing need to accurately model the angular scattering response of metasurfaces for optical analog processing applications. However, current metasurface modeling techniques are not well suited such task since they limited small spectrum transformations, as shall be demonstrated. The goal this work overcome limitation by improving accuracy these and, specifically, provide better description metasurfaces. This achieved extending methods, which restricted dipolar responses and weak spatially dispersive effects, so include quadrupolar higher-order components. newly derived multipolar demonstrated predicting dielectric placed in vacuum. results that substantially than standard model.