Fig. 2: Electrically and optically controlled domain switching in freestanding BTO films.
From: Subsecond optically controlled domain switching in freestanding ferroelectric BaTiO3 membrane
a PFM phase response demonstrating PDOWN (dark) and PUP (bright) regions written by applying +10 and −10 V to the tip over a 10 × 10 μm2 area, respectively. b After 391 nm illumination, PUP (bright) regions switched to PDOWN (dark). c–f Change of phase (Grey line) and amplitude (Orange line) with frequency at positions (1) and (2) c, d after electrical switching and e, f under optical illumination. Current vs voltage response at positions (1) and (2) g, h after electrical switching and i, j under optical illumination.
