Figure 5From: Electric field enhancement and far-field radiation pattern of the nanoantenna with concentric ringsElectric field intensity verse wavelength for the structures with concentric rings for different dielectric layer thickness. The field intensities at the middle of the gap of the DERS structure with concentric rings with periodicity of ring P = 650 nm and dielectric layer thicknesses of 20, 25, 30, 40, 50, and 60 nm.Back to article page