Building Simple and Effective Metasurfaces by Coarse Discretization

This work summarizes the authors recent research experiences and identifies advantages which one can gain by designing a metasurface with coarse discretization. Whereas most metasurfaces approximate a continuous impedance variation with a finely-discretized one, we show that in some cases coarse-grained discretization yields surprising benefits. In the presentation, we will summarize our recent works which show that the coarse discretization paradigm produces metasurface designs which are power efficient, simple to fabricate, and feature robust and broadband operation beyond traditional continuous metasurfaces. We will also preview our ongoing works in applying this paradigm to improve communication and imaging devices.