Figure 6 | Scientific Reports

Figure 6

From: Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

Figure 6

The lowest energy levels of an electron confined in a GaAs-Al\(_{0.28}\)Ga\(_{0.72}\)As coupled quantum dot-quantum ring, plotted as functions of a magnetic field, applied in \(z-\)direction. Three values of the applied electric field are taken into account: \(F=0\) (a), \(F=+20\) kV/cm (b), and \(F=-20\) kV/cm (c). Results correspond to a fixed configuration with \(z_0=45\) nm, \(z_D=65\) nm, \(R_1=R_2=15\) nm, and \(\theta =45^{\circ }\). The parameters have been chosen in such a way that dot and ring are in touch as shown in Fig. 2c. Some values of the l-quantum number are indicated. Black lines are for \(l=0\) and blue/red lines for negative/positive values of l.

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