Figure 2
From: A new non-destructive readout by using photo-recovered surface potential contrast
Photo-induced recovery of the surface potential contrast.
Surface potential profiles for (a) 18-nm-thick BFO films and (b) 50-nm-thick BFO films obtained from the inset of KPFM images measured without (dark) and with light illumination by a 375 nm laser (power density of 40 mW cm−2). The surface potential contrast between the adjacent oppositely polarized domains is marked. (c) Time dependence and (d) Power density dependence of ΔSP for 18-nm-thick and 50-nm-thick BFO films. Solid lines represent the fitting curves to an exponential decay function, respectively.
