Abstract
We report an efficient approach for ferro-paraelectric phase transition control in Cu:KTN crystals by using AC electric fields. Based on a dielectric loss mechanism, the thermal effect is induced directly inside the crystal without using extra thermal sources or complicated thermostat systems. By adjusting either the amplitude or the frequency of an AC electric field, we can easily and precisely control the ferro-paraelectric phase transition process which concurs with dynamic development of polar nanostructures of KTN crystals. In addition, we use a laser beam to probe in real time the dynamic process of crystalline phase transition. The study is important for developing novel electro-optic and ferroelectric devices for a wide range of photonic applications.
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