Figure 6
(a) Group delay as a function of the barrier thickness and frequency for the natural boundary conditions (see Supplementary Information) applied at the interface between the barrier and matrix. The peculiarities related to the non-monotonous dependence of τgr(L) are zoomed in the inset. (b) Frequency dependence of the saturation value of the group delay, τgr(L → ∞), for the indicated values of the exchange coupling between the barrier and matrix \({\tilde{A}}_{{\rm{mb}}}\). The calculations have been done for the same values of \({\tilde{M}}_{{\rm{S}}}\) = 1 and λex = 1 in the barrier and matrix. The inset in (b) presents the dependence of minimal τgr(L → ∞) on \({\tilde{A}}_{{\rm{mb}}}\). The parameters of the barrier are the same as those used in Fig. 2.
