Phononic crystal with free-form waveguiding and broadband attenuation

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Abstract

Waveguiding is highly desirable for multiple applications but is challenging to achieve in wide continuous frequency ranges. In this work, we developed a three-dimensional phononic crystal with broadband waveguiding functionality. Waveguiding is achieved by combining two types of unit cells with different wave scattering features to create an arbitrary-curved defect path. The unit cell design is governed by contradictory requirements to induce narrow- and broad-band wave attenuation along the path and within the phononic medium, respectively. This is achieved by modulating structural parameters to activate Bragg's scattering, local resonances and inertial amplification mechanism and interplay between them. We demonstrated numerically and experimentally the waveguiding with strong wave localization and confinement in additively manufactured three-dimensional structures along straight, angle- and arbitrary-curved paths. This work opens new perspectives for the practical utilization of phononic crystals in ultrasonic sensors, medical devices, and acoustic energy harvesters.

Original languageEnglish
Title of host publication202115th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages18-20
Number of pages3
ISBN (Electronic)978-1-7281-5018-5
ISBN (Print)978-1-6654-3083-8
DOIs
Publication statusPublished - 20-Sep-2021
Event15th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2021 - Virtual, New York, United States
Duration: 20-Sep-202125-Sep-2021

Publication series

Name2021 15th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2021

Conference

Conference15th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2021
Country/TerritoryUnited States
CityVirtual, New York
Period20/09/202125/09/2021

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