Figure 2: Methodology for filtering the G-VS data.
From: Rapid mapping of polarization switching through complete information acquisition
(a) 2D histogram of the raw cantilever deflection signal as a function of the tip excitation bias. (b) The raw signal is filtered in the frequency domain by discarding the signal below a calculated noise floor and by applying a band-pass filter to reject low and high frequency noise. (c) The filtered deflection signal showing strain loops. (d) The filtered signal is used to populate a 2D histogram and a mean strain loop (inner, black line) is constructed from the mean response at each voltage step.
