Fig. 1. Structural diagram of PCN-MRR. (a) Top view; (b) cross-sectional view; (c) one-dimensional photonic crystal nanobeam cavity

Fig. 2. Voltage and effective refractive index corresponding to different Fermi energy levels. (a) Voltage; (b) effective refractive index (inset is the TE mode electric field distribution at E_F=0.55 eV, λ=1550nm)

Fig. 3. Transmission spectra and electric field diagram corresponding to different structures. (a) Transmission spectra; (b) electric field diagram of PCN cavity; (c) electric field diagram of MRR

Fig. 4. Electric field diagrams and phase diagram corresponding to the three points a, b, and c in Fig.3. (a) Electric field diagram of point a; (b) electric field diagram of point b; (c) electric field diagram of point c; (d) phase diagram

Fig. 5. Corresponding diagram of PCN-MRR structure and three-level atomic system producing EIT effect

Fig. 6. Regulation of the EIT window by the Fermi level. (a) Change the Fermi level of G₁ and G₂ at the same time; (b) change only the Fermi level of G₁; (c) change only the Fermi level of G₂

Fig. 7. Electric field diagrams corresponding to Fermi level at different wavelengths. (a) E_F=0.55 eV,λ=1595.75nm; (b) E_F=0.45 eV,λ=1597.68nm; (c) E_F=0.35 eV,λ=1597.27nm

Fig. 8. Regulation of EIT windows by coupling distance and microring radius. (a) Coupling distance; (b) microring radius

Fig. 9. Regulation of EIT windows by micro groove width and number of air holes. (a) Micro groove width; (b) number of air holes

Fig. 10. Refractive index sensing analysis results. (a) Transmission spectrum for different refractive indices; (b) sensitivity; (c) FOM

Fig. 11. Latency performance analysis results. (a) Group delay; (b) group index