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The sensitivity of ferroelectric domain walls to external stimuli makes themfunctional entities in nanoelectronic devices. Specifically, optically drivendomain reconfiguration with in-plane polarization is advantageous and thushighly sought. Here, we show the existence of in-plane polarized sub-domainsimitating a single domain state and reversible optical control of its domainwall movement in a single-crystal of ferroelectric BaTiO3. Similar opticalcontrol in the domain configuration of non-polar ferroelastic materialindicates long-range ferroelectric polarization is not essential for theoptical control of domain wall movement. Instead, flexoelectricity is found tobe an essential ingredient for the optical control of the domain configurationand hence, ferroelastic materials would be another possible candidate fornanoelectronic device applications.

Optical control of in-plane domain configuration and domain wall motion in ferroelectric and ferroelastic