Figure 3
From: Asymmetric effects in waveguide systems using PT symmetry and zero index metamaterials
Directional excitation and asymmetric reflection from the proposed three-port ZIM waveguide with PT symmetry. (a) and (b) are the corresponding magnetic field patterns in a three-port waveguide system for the incident wave from port 1 and port 2, respectively. In the simulations, we set ξ = 1.2, δ = 0.05 π, w = w o, λ = 0.5w o l = 0.5w 0, h = 0.25w 0 and the ZIM is \({\varepsilon }_{ZIM}={\mu }_{ZIM}=0.01\). (c) and (d) are the corresponding field patterns in a three-port ZIM waveguide system for the cases of the incident waves from port 1 with gain medium and port 2 with loss medium, respectively, where the area of ZIM is constructed into circle cross section (r = w 0). The widths of these ports are w 0. In the simulations, other parameters are identical with these in (a) and (b).
