Fig. 7From: Polarization Converter with Controllable Birefringence Based on Hybrid All-Dielectric-Graphene Metasurfacea Schematic illustration of the silicon/graphene switching of the polarization state through gate voltage biasing. b. Simulated phase difference as a function of gate voltage biasing. c. Phase difference shown as function of periodicity P x and gate voltage. d. Stokes parameter S3 spectra showing the two states of circular polarization defined by the different gate voltagesBack to article page