Acoustic Metasurface for Space-time Reflection Manipulation.

ABSTRACT: Recently, space-time modulation has revolutionized the wave engineering technologies, providing unprecedented opportunities beyond traditional static systems. This advancement is crucial across diverse fields, ranging from non-reciprocal transmission to wireless communication. However, the current approaches to sound modulation require bulky artificial structures and are limited in achieving space-time-variable sound-matter interactions. Here, a prototype of space-time acoustic metasurface (STAM) is proposed and implemented, consisting of a reflective piezoelectric array controlled by a field-programmable gate array. Leveraging the spatiotemporally programmable phases of the STAM, this is experimentally achieved Doppler-like chirp modulation and space-time modulation with deterministic fre

SUBMITTER: Yang Y 

PROVIDER: S-EPMC12463000 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature