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Design of the proposed polymeric sensor. (a) 3D view of a short section in the sensing area, where the interaction between the graphene-based capacitor and the polymeric waveguide, is presented. (b) Schematic of Mach-Zehnder interferometer biosensor. (c) Cross-section view of the sensing area, where the proposed device configuration is shown. (d) Mode distribution in SU-8 waveguide, interacting with the capacitive structure.
