Experimental realization of phonon demultiplexing in three-dimensions

TL;DR

This paper reports the first experimental demonstration of a three-dimensional phononic demultiplexer, enabling multi-channel frequency sorting in 3D structures for advanced acoustic and elastic information processing.

Contribution

It introduces a novel 3D phononic demultiplexer design based on pass-band bundles within a large band gap, expanding beyond previous 2D implementations.

Findings

Successful experimental realization of a 3D four-channel phononic demultiplexer

Demonstrated tunability of pass-bands for multi-channel frequency sorting

Potential applications in acoustic communication and nondestructive evaluation

Abstract

Phononic metamaterials enabled the realization of many acoustic components analogous to their electronic counterparts, such as transistors, logic gates and calculators. A key component among these is the demultiplexer, a device that receives multiple signals and sorts them based on their frequencies into separate channels. Previous experimental realizations of acoustic and elastic multiplexers have employed plates with pillars or holes to demultiplex frequencies. However, existing realizations are confined to two-dimensions, which can limit potential acoustic or elastic circuit design. Here we show the first experimental realization of a three-dimensional, four channel phononic demultiplexer. Our design methodology is based on bundles of pass-bands within a large band gap that can easily be tuned for multi-channel frequency demultiplexing. The proposed design can be utilized in acoustic and elastic information processing, nondestructive evaluation and communication applications among others.