Figure 2: Microsphere superlens imaging in transmission mode.
From: Optical virtual imaging at 50 nm lateral resolution with a white-light nanoscope
(a) Microsphere superlens imaging of 360-nm-wide lines spaced 130 nm apart (top left image taken by scanning electron microscope (SEM)), the optical nanoscope (ON) image (top right image) shows that the lines are clearly resolved. (b) A gold-coated fishnet AAO sample imaged with a microsphere (a=2.37 μm, borders of two spheres are shown by white lines) superlens. The nanoscope clearly resolves the pores that are 50 nm in diameter and spaced 50 nm apart (bottom left SEM image). The size of the optical image between the pores within the image plane is 400 nm (bottom right ON image). It corresponds to a magnification factor of M≈8. Scale bar, 5 μm.
