Fig. 1: High-quality factor metasurfaces for two-dimensional wavefront manipulation.

a Schematic of the metasurface consisting of amorphous silicon nanoblocks on a glass substrate. The surface is illuminated at normal incidence and can deflect light along the angles θ and φ in the full upper hemisphere. b Calculated transmission (T) in blue and reflection (R) spectra in red of the metasurface with P = 736 nm, H = 695 nm, L = 555 nm. c Calculated transmission intensity (blue) and phase (red) with varying nanoblock side lengths L, P = 736 nm, and H = 695 nm at a wavelength of λ = 1288 nm. d, e Simulated transmission of the metasurface in (a) with varying angle of incidence for TE (d) and TM (e) polarization.