Figure 5

Electrical field distribution at the interface calculated using the FDTD method.
(a) Electrical field distribution at the metal substrate calculated using the FDTD method with the effective medium approximation model for the metamaterials on a Ag substrate by exciting with a 30-nm point dipole located 10 nm from the metal substrate. (b) Reference calculation for the same sample on quartz. (c) Reference calculation for the model with the same refractive index and a zero absorbance.