Figure 4: Super-resolution foci and virtual magnification factor analyses.
From: Optical virtual imaging at 50 nm lateral resolution with a white-light nanoscope
(a) Super-resolution strength, defined as (focus spot size−Rayleigh limit)/radius, as a function of size parameter q for different refractive index particles. The inset shows q up to 300 for n=1.46. (b) The intensity distributions calculated for SIL (left image, height H=a(1+n−1)), sphere (middle image) and particle on surface(right image) of a 40-nm-thick gold film for the sphere with radius a=2.37 μm and refractive index n=1.46 at the wavelength λ=600 nm. (c) Full width at half maximum of foci for SIL (blue solid), sphere (red dot) and sphere on substrate (green solid). (d) Virtual image magnification versus particle size for sphere with n=1.46 at the wavelength λ=600 nm.
