Fig. 1. SCPCF-SPR biosensor. (a) Cross-section; (b) diagram of the proposed 3D model; (c) diagram of the proposed sensor set-up

Fig. 2. Resonance curve and dispersion curve of SCPCF-SPR

Fig. 3. Effect of structure parameters on the quality of SCPCF-SPR biosensors. (a) Fundamental mode resonance loss curves at different values of d1; (b) fundamental mode resonance loss curve when silver film thickness changes

Fig. 4. (a) na=1.33 or 1.34, the fundamental mode resonance loss curves; (b) na=1.33-1.38, the change of the peak value of the resonant sub peak

Fig. 5. Analysis of the sensitivity of SCPCF-SPR. (a) Resonance curves when na=1.33-1.38; (b) relationship between the resonance wavelength and the analyte refractive index

Fig. 6. (a) Comparison of the linear fitting curves between the resonance wavelength and the analyte refractive index; and (b) contrast diagram of formant peak with the change of analyte refractive index under the condition of adding and without adding TiO2 film

Fig. 7. (a) Diagram of changes in FWHM; and (b) diagram of changes in evanescent field penetration depth when na=1.33-1.38