Figure 3.

An asymmetric double well as an active element in periodic cascade quantum well structure. ( a) Proposed design of the active element of the periodic cascade quantum well structure and the calculated wave functions of the first and second subbands. ( b) The dependence of the 1 to 2 intersubband spacing on the narrow well width aR. (c) The values of the averages 〈z〉ν for corresponding subbands as a function of narrow well width aR.

Telenkov et al. Nanoscale Research Letters 2012 7:491   doi:10.1186/1556-276X-7-491
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