Fig. 1. 2D schematic of plasma nanosensor composed of SSR and MIM waveguide with stub

Fig. 2. Transmission spectra of the MIM waveguide side coupled complete square ring and side coupled SSR

Fig. 3. Transmission spectra of sensor system, MIM waveguide with stub, and SSR

Fig. 4. Magnetic field distributions of waveguide structures at different wavelengths. (a) λ_dip=785 nm; (b) λ_peak=810 nm

Fig. 5. Performance curves of sensor at different refractive indices. (a) Transmission spectra; (b) Fano resonant peak shift versus change in refractive index

Fig. 6. Performance curves of sensor at different orientation angles. (a) Transmission spectra; (b) Fano resonant peak shift versus change in refractive index