Fig. 1. Schematic design of EIT-like structure，transmission spectrum and electric-field distribution

Fig. 2. EIT-like effect of SSPP transmission lines and electric-field distribution at characteristic frequency

Fig. 3. Transmission coefficients S₂₁ under different refractive indices of the analytes and the fitting line shape between EIT-like peak frequency and refractive index

Fig. 4. Influence of tangent loss of the analytes on EIT-like effect

Fig. 5. Transmission coefficients S₂₁ under different thickness of the analytes and the fitting line shape between EIT-like peak frequency and refractive index

Fig. 6. Transmission coefficients S₂₁ under different radius of the analytes and the fitting line shape between EIT-like peak frequency and refractive index

Fig. 7. Experimental results of SSPP transmission line based on EIT-like effect for three edible oils