Fig. 5

The first experimental demonstration of near-field superlens. a Experimental set-up. 60 nm-wide slots of 120 nm pitch and letters ‘NANO’ whose linewidth is 40 nm are inscribed onto chrome. Here, silver slab functions as a superlens. b Experimental results. Top: FIB image of the object. Middle: AFM image of the image with the superlens. Bottom: AFM image of the image when the superlens was replaced by PMMA spacer. (The scale bars indicate 2 μm) [52]