The effect of parameter d₂ on the real and imaginary parts of amplitude transmission coefficients of waves 1, 2 (a, b) and trajectories of the tips of vectors t_1,2 on the complex plane depending on parameters d₂ (c–f) and (g,h). The values of parameters are: ε₁ = ε₃ = 2 + 10⁻³ i (a, c, e); ε₁ = ε₃ = 0.01 + 0.01i (b, d, f); , d₂ = 39 nm (g, h). The values of parameters for all the graphs are: d_1,3 = 0.25 μm, λ = 0.63 μm.