Figure 4.
Imaging using the bifocal metalens. a) Captured images of a negative 1951 USAF resolution target using the bifocal metalens for objects in the focal plane of i) f 1 and ii) f 2 with LCP and RCP incident light, respectively. b) Normalized intensity of horizontal cuts across element 3 of group 3 of the target. The location of the cut is shown as a dashed line in (a). c) MTF of the metalens at i) f 1 and ii) f 2.The dashed red lines show the MTF of perfect diffraction limited lenses and the dashed grey lines denote the cutoff frequency.