Figure 6
From: Fast probe of local electronic states in nanostructures utilizing a single-lead quantum dot
(a,b) Energy diagram when small square wave voltages are applied on VPP. If the target QD is empty (filled), inter-dot tunneling does not occur (a) (does occur (b)). (c) Real-time detection of charges in the target QD. Vrf is plotted as a function of t. The traces show results when QD levels are changed against the Fermi energy. In the shaded regions, the amplitude becomes small because the target QD is filled and inter-dot tunneling occurs. The tunneling electrons screen the square wave and the amplitude of Vrf decreases.
