Dynamic control of elastic wave transmission by a digital metalayer

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number144503
JournalJournal of Applied Physics
Volume136
Issue number14
DOIs
Publication statusPublished - 14 Oct 2024

Fingerprint

Dive into the research topics of 'Dynamic control of elastic wave transmission by a digital metalayer'. Together they form a unique fingerprint.

Cite this