Figure 7
Comparison of sensing performance between the visible hybrid angular-interrogation SPR (wavelength = 633 nm, blue line) and NIR one (wavelength = 1550 nm, red line) based on theoretical calculations for Kretschmann configuration of the four-layer model7 when a water is used as a sample. (a) Comparison of angular SPR reflectance spectra between visible and NIR regions. (b) RI-change-dependence of the angular SPR reflectance angle (θSPR) at visible and NIR regions. (c) Ratio of RI-dependent θSPR shift to SPR dip shift with respect to RI change at visible and NIR regions. (d) RI-change-dependence of SPR reflectance at 633 and 1550 nm. The sample RI is increased from the pure water (RI = 1.3334 RIU at 633 nm and 1.3317 RIU at 1550 nm).
