Study of resonant processes in plasmonic metasurfaces for SPR sensing

We investigate selected periodic arrays of nanostructures inspired by metasurfaces and evaluate their potential for surface plasmon resonance (SPR) effect used in sensor applications. Building blocks with various shapes were arranged on suitable substrates and their reflection, transmission, and loss energy spectra were calculated. The numerical studies were performed using our proprietary in-house efficient two-dimensional rigorous coupled-wave analysis technique. Using the calculated spectra, we investigated spectral sensitivities of SPR and calculated the respective SPR sensor characteristics, such as figures of merit (FOM), enabling direct comparison of various structural morphologies for potential sensing applications. Comparing various metasurface structures in terms of FOM has allowed identification of the promising candidates.