Fig. 6. Conceptual demonstration of AR enabled by multifunctional nonlocal metasurfaces.

a Illustration showing the operation of an AR headset with multifunctional nonlocal metasurfaces as optical see-through lenses. b Schematic of a super-period of a nonlocal meta-optics system implementing three distinct phase gradients at three chosen visible wavelengths, respectively. See Table S1 for detailed design parameters. c Simulated transmission and reflection spectra of the meta-optics system. Arrows indicate three TE q-BICs for wavefront shaping at the three colors. Additional spectral features correspond to TM modes associated with the chosen TE modes or result from subtle symmetry-breaking introduced by meshing during full-wave simulations. d Simulated reflected wavefronts shaped by independent q-BICs at λ_B = 439 nm, λ_G = 542 nm, and λ_R = 612 nm. Arrows indicate light propagation directions at the three colors