Acoustic Metamaterials Crystal for Passive Parity-Time-Symmetric Modulation

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The exploration of parity-time (PT) symmetry with classical wave systems has enabled many counter-intuitive ways of wave manipulation and innovative applications, yet is still a great challenge for sound waves as acoustic gain medium is not readily accessible. Here we report the realization of an acoustic metamaterials crystal that respects passive PT symmetry, by interleaving groove-and holey-structured metamaterials to offer intrinsic PT-symmetric potential without any active element. At the exceptional point where a transition from the unbroken to broken PT symmetry phase happens, unidirectional sound reflectionless effect is numerically achieved. Our demonstration provides a feasible path to the investigation of PT symmetry in acoustic wave system with practical structures free of gain medium.

Original languageEnglish
Title of host publication2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages257-259
Number of pages3
ISBN (Electronic)9781538647028
DOIs
Publication statusPublished - 13 Nov 2018
Event12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018 - Espoo, Finland
Duration: 27 Aug 20181 Sep 2018

Publication series

Name2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018

Conference

Conference12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018
CountryFinland
CityEspoo
Period27/08/181/09/18

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Atomic and Molecular Physics, and Optics
  • Radiation

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