Qiao Liao, Gao Xiangyu, Ren Kaile, Qiu Chaorui, Liu Jinfeng, Jin Haonan, Dong Shuxiang, Xu Zhuo, Li Fei
Electronic Materials Research Laboratory, Key Lab of Education Ministry and State Key Laboratory for Mechanical Behavior of Materials, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Institute for Advanced Study, Shenzhen University, Shenzhen, 518051, China.
Nat Commun. 2024 Jan 27;15(1):805. doi: 10.1038/s41467-024-45088-3.
Simultaneously generating various motion modes with high strains in piezoelectric devices is highly desired for high-technology fields to achieve multi-functionalities. However, traditional approach for designing multi-degrees-of-freedom systems is to bond together several multilayer piezoelectric stacks, which generally leads to cumbersome and complicated structures. Here, we proposed a transparent piezo metasurface to achieve various types of strains in a wide frequency range. As an example, we designed a ten-unit piezo metasurface, which can produce high strains (ε = 0.76%), and generate linear motions along X-, Y- and Z-axis, rotary motions around X-, Y- and Z-axis as well as coupled modes. An adaptive lens based on the proposed piezo metasurface was demonstrated. It can realize a wide range of focal length (35.82 cm ~ ∞) and effective image stabilization with relatively large displacements (5.05 μm along Y-axis) and tilt angles (44.02' around Y-axis). This research may benefit the miniaturization and integration of multi-degrees-of-freedom systems.
在高科技领域中，为了实现多功能性，人们非常希望在压电器件中同时产生具有高应变的各种运动模式。然而，设计多自由度系统的传统方法是将几个多层压电堆栈粘结在一起，这通常会导致结构笨重且复杂。在此，我们提出了一种透明压电超表面，以在很宽的频率范围内实现各种类型的应变。例如，我们设计了一个十单元压电超表面，它可以产生高应变（ε = 0.76%），并沿X、Y和Z轴产生线性运动，绕X、Y和Z轴产生旋转运动以及耦合模式。展示了一种基于所提出的压电超表面的自适应透镜。它可以实现很宽范围的焦距（35.82厘米~无穷大），并通过相对较大的位移（沿Y轴5.05微米）和倾斜角度（绕Y轴44.02'）实现有效的图像稳定。这项研究可能有利于多自由度系统的小型化和集成。
