Fig. 1: Functionality of resonant, wavefront-shaping metasurfaces.

a Schematic illustrating the distinction between three types of metasurfaces. The nonlocal wavefront-shaping metasurface demonstrated in this work provides spatial control exclusively across its sharp spectral features: it molds optical wavefronts only at the resonant frequency, while leaving the optical wavefronts impinging at other frequencies unchanged. b Schematic illustrating two approaches to realize multifunctional nonlocal wavefront-shaping meta-optics