Fig. 2.

The Chiral biosensor is constructed by replicating a diagonally-symmetrical unit cell which consists of a graphene split ring designed with two L-shaped resonators. Different dimensions are given by $L_{x1}=L_{y1}$ = 7.5 μm and $L_{x2}=L_{y2}$ = 6 μm and width of split ring is 1 μm. The distance between two unit cells (periodicity) is p = 10 μm. The incident linearly polarized electric fields are reflected as elliptically polarized electromagnetic waves whose ellipticity depends on the dielectric characteristics of the analyte (sample under test).