Table 1.
Overview of methods and parameters, topography carrier in all cases is the first eigenmode of the cantilever ωt = ω0. ω1 represents the second eigenmode of the cantilever.
Method | electrical excitation | electrical detection | feedback | UAC |
AM Lift Mode | ωE = ω0 | ω0 | X(ω0) = min | 1 V |
AM 2 EM | ωE = ω1 | ω1 | X(ω1) = min | 1 V |
AM Off Res | ω0>> ωE = 10 kHz | ωE | X(ωE) = min | 1 V |
FM Sideband | ω0 >> ωE = 1.5 kHz | ω0 ± ωE | X(ω0 + ωE) − X(ω0 − ωE) | 2 V |
FM Heterodyne | ωE = ω1 − ω0 | ω1 | X(ω1) = min | 1 V |