Dynamic control of elastic wave transmission by a digital metalayer

Guangfu Hong, Han Jia*, Yu Yang, Yunhan Yang, Yuzhen Yang, Jun Yang, Xujin Yuan*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

Piezoelectric materials with shunt circuits have aroused much research interest due to flexible parameter adjustment. However, shunted piezoelectric elements are difficult to respond to the dynamic changes in the whole system due to the absence of autonomous control ability, which constrains their practical applications. Here, we propose a digital metalayer to control the wave energy transmission across different materials in real time. This digital metalayer comprises a stack of multiple piezoelectric lead zirconate titanate (PZT) disks connected with shunt capacitance circuits (SCCs). The external digital control system adjusts the effective acoustic impedance of the PZT disks through digital potentiometers and microprogrammed control unit, thereby enabling digital manipulation of wave transmission. Utilization of optimized SCCs further enhances adjustment accuracy, supporting both negative and positive capacitance values. The experiments demonstrate that this digital metalayer exhibits remarkable performance in controlling wave transmission. Moreover, the distinct variations in transmitted amplitudes, precisely controlled by the digital metalayer, are harnessed as binary signals for information transmission. An image of letters is encoded into a series of amplitude-modulated waves by the digital metalayer and clearly transmitted. The proposed digital metalayer shows great promise for applications in intelligent impedance matching and the real-time modulation systems.

源语言英语
文章编号144503
期刊Journal of Applied Physics
136
14
DOI
出版状态已出版 - 14 10月 2024

指纹

探究 'Dynamic control of elastic wave transmission by a digital metalayer' 的科研主题。它们共同构成独一无二的指纹。

引用此