Figure 3
From: Far-field subwavelength imaging with near-field resonant metalens scanning at microwave frequencies
Far-field subwavelength imaging in free space.
(a) Schematic view of the subwavelength source target and the distribution of the receivers. Four receivers in different directions are 5λ away from the SRR metalens, where λ is the wavelength at 3.55 GHz in free space. (b) The summation of the electric field intensities of the four receivers when different cells are turned on. (c) The image of the subwavelength squared target. The dotted circles are the edge profiles of the small loop sources composing the square ring target to be imaged.
