Fig. 4From: Polarization Converter with Controllable Birefringence Based on Hybrid All-Dielectric-Graphene MetasurfaceaPhase components and retardation of an all-dielectric/graphene metasurface and b the corresponding transmission coefficients T xx and T yy . Phase retardation plotted as a function of wavelength for L1 = 440 nm, L2 = 370 nm, and W = 60 nm, for c varying Fermi energy and d varying L2 from 350 to 450 nmBack to article page