Figure 2
From: Absence of Exceptional Points in Square Waveguide Arrays with Apparently Balanced Gain and Loss
Evolution of eigen-indices with increasing unperturbed gain/loss factor γ.
(a) Real and (b) imaginary parts of four supermodes neff for a Hamiltonian H as a function of γ. The parameters used in the theoretical analysis are ne = 2.477, κT = 0.043 and κL = 0.061.
