Figure 4

(a) 1D maximum absolute Ez along the blue line indicated in the lens structure placed 0.25 mm above the lens base. (b) Time lapse representation of real Ez inside the Maxwell fisheye lens when the Ez phase increases from 0° to 90°. Source point is at the bottom edge and image point at the top edge. (Colour map dynamic range: 0–8 × 103 Vm).