Figure 3
From: Fast probe of local electronic states in nanostructures utilizing a single-lead quantum dot
(a) Schematic of an energy diagram with applied square wave voltages on VPP. The levels in the probe SLQD and the target QD are shifted by the square wave (filled pairs of lines). In case I and III, tunneling of electrons does not occur. Tunneling only occurs in case II. (b) Vrf as a function of t. The origin of the horizontal axis is set at falling edges of the square wave. The plotted value of Vrf is a result of averaging 4096 measurements. The traces (offset by −20 mV) show results with VPP = −1070, −1050, −1030 mV corresponding to case I, II and III, respectively. (c) Close up of the energy diagram in case II and in a phase of electron tunneling from the target QD to the probe SLQD. Tunneling is enhanced in case ii. (b) Vrf as a function of t. The traces (offset by −20 mV) show results with VPP = −1053, −1052, −1051 mV corresponding to case i, ii and iii, respectively.
