Design of conventional SPR sensors

We proposed and numerically demonstrated a long-range surface plasmon resonance (LRSPR) imaging sensor (2S2G prism/ Cytop/Au/antimonene/BRE/sensing medium) structures for the sensing of large-sized biomolecules in the visible range. The proposed LRSPR sensor exhibits ultrahigh imaging sensitivity (5766.2 RIU−1), detection accuracy (100 deg.−1), and figure of merit (1960 RIU−1). The numerical analysis demonstrates a significant improvement in sensor performance when compared to conventional SPR sensor structures