Fig. 1. Diagram of light incident in negative direction of Y axis into different structures. (a) MIM waveguide; (b) MIM-SPPs resonator

Fig. 2. SPPs resonator. (a) Structural sketches; (b) field distribution of incident TE polarized light; (c) field intensity contrast curves of center point inside cavity and any point outside cavity; (d) performance curves in cavity

Fig. 3. SPPs resonator with periodic arrangement of point light source incident. (a) Schematic of light focusing on sensor surface; (b) simulation results of FDTD

Fig. 4. Schematic of CCD unit

Fig. 5. Performance diagram of SPPs resonator with Si nanowires. (a) Field distribution diagram; (b) transmission, reflection and absorption spectra of broad spectrum; (c) imaginary part data points of Si refractive index; (d) carrier concentration curves