Fig. 2.
PMN-PT 1-3 composite structures by dry etching (The etching depth is about 30 μm, the gap between each array element is 16 μm, the pillar size is 9 μm by 9 μm, and the kerf between each pillar is 5 μm. With the same area of each element, the width of the outer element is only about 100μm.)