Broadband Asymmetric Propagation in Pillared Meta-Plates

Broadband Asymmetric Propagation in Pillared Meta-Plates

The asymmetric propagation of mechanical energy across interfaces is a challenging problem with a wide range of applications. In this work, we present a novel structure presenting the asymmetric propagation of elastic waves in thin plates in a broadband range. The structure consists of a combination...

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Main Authors: Lin Chen, Wei Wang, Guohua Nie, Yabin Jin, Daniel Torrent, Bahram Djafari-Rouhani
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Crystals
Subjects:
phononic crystals
Lamb wave
asymmetric transmission
Online Access:https://www.mdpi.com/2073-4352/10/8/702
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spelling doaj-60ba6398e41a42dbb295e06ef518d9b92020-11-25T03:53:13ZengMDPI AGCrystals2073-43522020-08-011070270210.3390/cryst10080702Broadband Asymmetric Propagation in Pillared Meta-PlatesLin Chen0Wei Wang1Guohua Nie2Yabin Jin3Daniel Torrent4Bahram Djafari-Rouhani5School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, ChinaAboratoire de Recherche en Informatique, Sciences Sorbonne Université, UPMC Université Paris 06 (INSP–UMR CNRS 7588), 4 Place Jussieu, 75005 Paris, FranceSchool of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, ChinaSchool of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, ChinaGROC-UJI, Institut de Noves Tecnologies de la Imatge, Universitat Jaume I, 12080 Castello, SpainDépartement de Physique, Institut d’Electronique, de Microélectonique et de Nanotechnologie, Université de Lille, UMR CNRS 8520, 59650 Villeneuve d’Ascq, FranceThe asymmetric propagation of mechanical energy across interfaces is a challenging problem with a wide range of applications. In this work, we present a novel structure presenting the asymmetric propagation of elastic waves in thin plates in a broadband range. The structure consists of a combination of symmetrically and asymmetrically distributed pillars, so that the former decouple the different Lamb modes and the latter mix all of them. We show that a combination in tandem with these two structures can realize an efficient broadband asymmetric propagation at the subwavelength range and achieve a transmission difference larger than 200 dB between forward and backward directions. The proposed pillared meta-plate brings a new way for subwavelength and broadband wave manipulation in the fields of wave isolation, sensing and communication, among others.https://www.mdpi.com/2073-4352/10/8/702phononic crystalsLamb waveasymmetric transmission
collection DOAJ
language English
format Article
sources DOAJ
author Lin Chen
Wei Wang
Guohua Nie
Yabin Jin
Daniel Torrent
Bahram Djafari-Rouhani
spellingShingle Lin Chen
Wei Wang
Guohua Nie
Yabin Jin
Daniel Torrent
Bahram Djafari-Rouhani
Broadband Asymmetric Propagation in Pillared Meta-Plates
Crystals
phononic crystals
Lamb wave
asymmetric transmission
author_facet Lin Chen
Wei Wang
Guohua Nie
Yabin Jin
Daniel Torrent
Bahram Djafari-Rouhani
author_sort Lin Chen
title Broadband Asymmetric Propagation in Pillared Meta-Plates
title_short Broadband Asymmetric Propagation in Pillared Meta-Plates
title_full Broadband Asymmetric Propagation in Pillared Meta-Plates
title_fullStr Broadband Asymmetric Propagation in Pillared Meta-Plates
title_full_unstemmed Broadband Asymmetric Propagation in Pillared Meta-Plates
title_sort broadband asymmetric propagation in pillared meta-plates
publisher MDPI AG
series Crystals
issn 2073-4352
publishDate 2020-08-01
description The asymmetric propagation of mechanical energy across interfaces is a challenging problem with a wide range of applications. In this work, we present a novel structure presenting the asymmetric propagation of elastic waves in thin plates in a broadband range. The structure consists of a combination of symmetrically and asymmetrically distributed pillars, so that the former decouple the different Lamb modes and the latter mix all of them. We show that a combination in tandem with these two structures can realize an efficient broadband asymmetric propagation at the subwavelength range and achieve a transmission difference larger than 200 dB between forward and backward directions. The proposed pillared meta-plate brings a new way for subwavelength and broadband wave manipulation in the fields of wave isolation, sensing and communication, among others.
topic phononic crystals
Lamb wave
asymmetric transmission
url https://www.mdpi.com/2073-4352/10/8/702
work_keys_str_mv AT linchen broadbandasymmetricpropagationinpillaredmetaplates
AT weiwang broadbandasymmetricpropagationinpillaredmetaplates
AT guohuanie broadbandasymmetricpropagationinpillaredmetaplates
AT yabinjin broadbandasymmetricpropagationinpillaredmetaplates
AT danieltorrent broadbandasymmetricpropagationinpillaredmetaplates
AT bahramdjafarirouhani broadbandasymmetricpropagationinpillaredmetaplates
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