Figure 6.

Ground and first excited states. Ground and first excited state energies of the electron (colored lines) as functions of the (a) inner and (b) outer radii of the QR for L=20 nm, P=0, and F=0. The impurity is placed at zi = 0 and ρi =  (R1 + R2)/2. The insets show the corresponding energy difference between the 2s and 1s states.

Barseghyan et al. Nanoscale Research Letters 2012 7:538   doi:10.1186/1556-276X-7-538
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