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The electric field vs peak terahertz-emission amplitude hysteresis loops for 65, 95, 110, and thin films, recorded at room temperature.
(Color) Visualization of the photoassisted ferroelectric polarization switching thin films. The top, middle and bottom panels show the terahertz-emission images for 85, 65, and thin films, respectively, recorded in applied bias sequence of . The gap between dipole-type optical switch (plotted in yellow) is and between the electrodes is and, therefore, an applied bias of develops an electric field of 200 and , respectively, between the dipole and between the electrodes. The red-colored and blue-colored regions indicate the terahertz radiation of opposite sign, representing ferroelectric domains of opposite polarities.
Electric field vs peak terahertz-emission amplitude hysteresis loops for 65, 95, and thin films, recorded at room temperature before and after the optical switch was mapped for terahertz emission to acquire the ferroelectric domain images. The dashed lines and the dotted lines show the center of loops, respectively, recorded before and after scanning of the optical switch.
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