Laser-Combined Scanning Tunneling Microscopy on the Carrier Dynamics in Low-Temperature-Grown GaAs/AlGaAs/GaAs
Figure 3
LM-STS measurement and results. (a) Schematic of measurement setup. (b)–(d) spectra obtained for (b) GaAs (200 nm from the GaAs/AlGaAs interface), (c) AlGaAs (200 nm from the GaAs/AlGaAs interface), and (d) LT-GaAs (150 nm from the AlGaAs/LT-GaAs interface). Red and blue curves correspond to the curves with and without illumination, respectively. Oscillation between the two curves is due to the illumination being switched on and off at 100 Hz. , .
