Fig. 1. Single-baffle MDM waveguide coupled disk cavity cascade structure

Fig. 2. Fano resonance formation process. (a) Transmission spectrum with only baffle or only cascaded disk cavity; (b) Fano resonance spectrum formed by single-baffle MDM waveguide coupled disk cavity cascade structure

Fig. 3. Steady electric field distributions under different wavelengths. (a) 740 nm; (b) 755 nm; (c) 1194 nm; (d) 1214 nm

Fig. 4. Effect of radius change on Fano formant and FOM. (a) Fano formant; (b) FOM

Fig. 5. Effect of metal-baffle thickness on Fano formant and FOM. (a) Fano formant; (b) FOM of mode 1; (c) FOM of mode 2

Fig. 6. Effect of parameter t change on Fano formant and FOM. (a) Fano formant; (b) FOM

Fig. 7. Relationship between resonant wavelength and environmental refractive index n. (a) Transmission spectra under different environment refractive index n; (b) linear relationship between resonant wavelength and environmental refractive index n