Figure 4
From: Asymmetric effects in waveguide systems using PT symmetry and zero index metamaterials
Unidirectional transmission by introducing a modulated wave in port 3. (a) and (b) are the corresponding simulated magnetic field patterns for the cases of the incident waves from port 2 with loss and port 1 with gain, respectively. In plots, to ensure better destructive interference in ZIM, the cross section of ZIM is designed into square one with a side length of w 0.
