
Schematic cross section of the test GaAs multilayer sample.

E-CV (a) and SCM (b) profile of the GaAs test sample.

Calibration curves of SCM measurement.

Schematic cross section of InGaAs tunnel junction sample.

E-CV (a) and SCM (b) profiles of InGaAs tunnel junction sample.

Schematic cross-section of AlGaN/GaN/Si heterostructure.

Topography profile (blue) and SCM signal scan (red) of AlGaN/GaN/Si heterostructure.