This talk is dedicated to the use of Fourier techniques for the purpose of designing dielectric metalenses with reduced sidelobes. Metalenses act as submicron scale spatially varying phase plates that apply a quadratic phase shift to a signal, thereby focusing the beam. Abnormalities arise due to the incredibly small scale of the lens; however, spatial filtering techniques, similar to techniques used in optical signal processing, can be applied to counteract these abnormalities. These techniques lead to new strategies in metalens design to remove unwanted effects, such as sidelobes, and a possibility of new functionality for metasurfaces in general.
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