Fig. 3.

a Phase components and retardation of an all-dielectric metasurface without graphene. Transmittance plotted as a function of wavelength for L₁ = 440 nm, L₂ = 370 nm, and W = 60 nm, for b structure without graphene and with graphene (E_F = 0.8 eV), c varying Fermi energy, and d varying L₂ from 350 to 450 nm. Symmetry breaking at L₂ = 410 nm splits two dominant modes: magnetic and electric