Figure 3
From: Tunneling times of acoustic phonon packets through a distributed Bragg reflector
The vibrational energy density, the one-dimensional stress tensor and the relative displacements. (a) The vibrational energy density 
(in a.u.), (b) the one-dimensional stress tensor σ (in a.u.), (c) and the relative displacements u (in a.u.) in the structure, plotted as a function of the normalized distance along the axis of the DBR. The distance is normalized by the factor l c=d
A
+d
B
.