Fig. 3From: Polarization-Dependent Quasi-Far-Field Superfocusing Strategy of Nanoring-Based Plasmonic LensesIntensity distribution pattern of the total electric field |E|2 in the case of linearly polarized incident light. The inset shows the intensity pattern in the focal plane. The focal length is 1215 nm (a deviation of 6.54%). The FWHMs of both foci are ~0.32 λ 0, with 400 nm apart from each other, and the depth of focus (DOF) is ~1.68 λ 0 Back to article page