Fig. 6.

The response of the graphene metasurface showing amplitude of (a) co- $\left|R_{xx}\right|$ and (b) cross- $\left|R_{yx}\right|$ polarization components of reflected field coefficients for the varying RI of analyte (${\text{n}}_{\text{analyte}}$) and (c) PER spectrum derived from (a) and (b). Color-bars are included to represent the varying scale of reflection coefficients.