Detection of peptides employing a THz metasurface based sensor

Sensors that can identify distinct peptides at varying specific volumes have been proposed. Variations in the width of the inner square structure, tail end width, and graphene chemical potential all go towards determining the optimal sensor configuration. Sensitivity, a figure of merit (FOM), detection limit, Quality factor (Q factor), detection limit (DL), and other performance-defining metrics are all used to evaluate sensor performance. The highest sensitivity of 175 GHz/RIU, Q factor of 17.62, a FOM of 4.52 1/RIU, and DL of 0.20 RIU were achieved by the proposed Metasurface Refractive Index Sensor (MRIS). The MRIS ensured the reproducibility and linear sensing by the R2 value of 0.9999 gained by linear fitting equation in our research. [Display omitted] •A metasurface based THz sensor for the detection of peptides is resented.•The optimal structure can detect peptides with the sensitivity of 175 GHz/RIU.•The Q factor, FOM, and DL of 17.62, 4.52 RIU−1, and 0.20 RIU is observed.•Linear sensing performance and reproducibility is confirmed by the R2 score of 0.9999.