Fig. 1. Amplitude curves of electromagnetic field in incident light
(a): Amplitude curve of electric field at (602, 5) nm;(b): Amplitude curve of electric field at (0, 7) nm;(c): Amplitude curve of magnetic field at (0, 7) nm

Fig. 2. Metal nanostructures studied in the simulation

Fig. 3. Stimulations of near surface electric field
(a): Amplitude; (b): Enhancement; (c): Phase

Fig. 4. Distributions of near surface electric field at resonant wavelength
(a): 600 nm;(b): 650 nm;(c): 720 nm

Fig. 5. Stimulations of near surface magnetic field
(a): Amplitude; (b): Enhancement; (c): Phase

Fig. 6. Distributions of near surface magnetic field at resonant wavelength
(a): 600 nm;(b): 650 nm;(c): 720 nm