Figure 4
(a) A sketch of the obtained structural parameters for the N = 10 period sample. The gray scale of the layers depicts the Ge content: the darker the more Ge. The exact values are listed in Table 1. (b) The thickness and Ge content of the layers constituting one period. The black curve corresponds to the obtained Ge content depending on the position within one period, while the gray/white background depicts the nominal Ge concentration. The red dashed line shows the smearing of the Ge concentration taking into account the waviness. |