Fig. 2: Experimental characterization of the aplanatic metalens. | Light: Science & Applications

Fig. 2: Experimental characterization of the aplanatic metalens.

From: Spectral tomographic imaging with aplanatic metalens

Fig. 2

a Calculated conversion efficiency of the optical field by the unit cell in the working wavelength range. b Optical and SEM images of the fabricated metalens with NA = 0.78. c Experimental longitudinal cross section of the focusing light intensity by a metalens at different wavelengths in the plane wave incidence. d Images of the USAF resolution test chart with the metalens at different wavelengths. e SEM image of a nanoslit sample. f Longitudinal cross section of the moving slit as a 2D point source imaged with the aplanatic (left) and normal (right) metalenses

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