Fig. 6: The simulated electric field intensity.
From: 2nd-Order Debye relaxation in electromagnetic metasurfaces for wideband dispersion engineering

a Simulated electric field intensity distribution (|E|||2 = |Ex|2 + |Ey|2) for the chromatic focusing metasurface: (i) 8.0 GHz, (ii) 9.0 GHz, (iii) 10.0 GHz, (iv) 11.0 GHz, (v) 12.0 GHz. b Simulated electric field intensity distribution (|E|||2 = |Ex|2 + |Ey|2)for the achromatic focusing metasurface: (i) 8.0 GHz, (ii) 9.0 GHz, (iii) 10.0 GHz, (iv) 11.0 GHz, (v) 12.0 GHz