Electric field distribution during polarization reversal in planar geometry is studied in BaSrTiO3 epitaxial films experimentally and numerically. Regularly perforated film forms two-dimensional photonic crystal, in which polarization can be reversed using interdigital electrode system. Dimensions of the system: electrode and gap width and hole depth (all of 1–2 μm) together with the electrode thickness (300 nm) reduce the spatial resolution of the used electric-force microscopy but allow nevertheless to monitor the numerically predicted sharp increase of electric field at the edges of electrode and at the holes.
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Sherstyuk et al. (2016) studied this question.
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