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Contour plot of the differential conductance, , of a single electron transistor which contain a single elliptic InAs QD with diameter (sample A) is plotted as a function of the source-drain voltage, , and the gate voltage, . Bright areas correspond to high values of . The inset (left) shows a SEM image of the fabricated device and the right is a sketch of the fabricated device.
Linear conductance spectrum taken on sample A by applying as function of the backgate voltage, .
The addition energy spectra of sample A (full circles) and sample B (triangles). The inset shows the electron charging energies for the , , and shells.
The linear conductance for the , , and states obtained from the Coulomb blockade oscillations. The inset shows schematic illustrations of the wave functions for the , , and shells.
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