TY - GEN
T1 - Acoustic Metamaterials Crystal for Passive Parity-Time-Symmetric Modulation
AU - Liu, T.
AU - Zhu, J.
PY - 2018/11/13
Y1 - 2018/11/13
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85058566364&partnerID=8YFLogxK
U2 - 10.1109/MetaMaterials.2018.8534175
DO - 10.1109/MetaMaterials.2018.8534175
M3 - Conference article published in proceeding or book
AN - SCOPUS:85058566364
T3 - 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018
SP - 257
EP - 259
BT - 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018
Y2 - 27 August 2018 through 1 September 2018
ER -