Acoustic cloaking by a near-zero-index phononic crystal

Handle URI:
http://hdl.handle.net/10754/552153
Title:
Acoustic cloaking by a near-zero-index phononic crystal
Authors:
Zheng, Li-Yang; Wu, Ying ( 0000-0002-7919-1107 ) ; Ni, Xu; Chen, Ze-Guo; Lu, Ming-Hui; Chen, Yan-Feng
Abstract:
Zero-refractive-index materials may lead to promising applications in various fields. Here, we design and fabricate a near Zero-Refractive-Index (ZRI) material using a phononic crystal (PC) composed of a square array of densely packed square iron rods in air. The dispersion relation exhibits a nearly flat band across the Brillouin zone at the reduced frequency f  = 0.5443c/a, which is due to Fabry-Perot (FP) resonance. By using a retrieval method, we find that both the effective mass density and the reciprocal of the effective bulk modulus are close to zero at frequencies near the flat band. We also propose an equivalent tube network model to explain the mechanisms of the near ZRI effect. This FP-resonance-induced near ZRI material offers intriguing wave manipulation properties. We demonstrate both numerically and experimentally its ability to shield a scattering obstacle and guide acoustic waves through a bent structure.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Acoustic cloaking by a near-zero-index phononic crystal 2014, 104 (16):161904 Applied Physics Letters
Journal:
Applied Physics Letters
Issue Date:
21-Apr-2014
DOI:
10.1063/1.4873354
Type:
Article
ISSN:
0003-6951; 1077-3118
Additional Links:
http://scitation.aip.org/content/aip/journal/apl/104/16/10.1063/1.4873354
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZheng, Li-Yangen
dc.contributor.authorWu, Yingen
dc.contributor.authorNi, Xuen
dc.contributor.authorChen, Ze-Guoen
dc.contributor.authorLu, Ming-Huien
dc.contributor.authorChen, Yan-Fengen
dc.date.accessioned2015-05-04T16:29:36Zen
dc.date.available2015-05-04T16:29:36Zen
dc.date.issued2014-04-21en
dc.identifier.citationAcoustic cloaking by a near-zero-index phononic crystal 2014, 104 (16):161904 Applied Physics Lettersen
dc.identifier.issn0003-6951en
dc.identifier.issn1077-3118en
dc.identifier.doi10.1063/1.4873354en
dc.identifier.urihttp://hdl.handle.net/10754/552153en
dc.description.abstractZero-refractive-index materials may lead to promising applications in various fields. Here, we design and fabricate a near Zero-Refractive-Index (ZRI) material using a phononic crystal (PC) composed of a square array of densely packed square iron rods in air. The dispersion relation exhibits a nearly flat band across the Brillouin zone at the reduced frequency f  = 0.5443c/a, which is due to Fabry-Perot (FP) resonance. By using a retrieval method, we find that both the effective mass density and the reciprocal of the effective bulk modulus are close to zero at frequencies near the flat band. We also propose an equivalent tube network model to explain the mechanisms of the near ZRI effect. This FP-resonance-induced near ZRI material offers intriguing wave manipulation properties. We demonstrate both numerically and experimentally its ability to shield a scattering obstacle and guide acoustic waves through a bent structure.en
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/apl/104/16/10.1063/1.4873354en
dc.rightsArchived with thanks to Applied Physics Lettersen
dc.titleAcoustic cloaking by a near-zero-index phononic crystalen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalApplied Physics Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionNational Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
dc.contributor.institutionNational Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
dc.contributor.institutionNational Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
dc.contributor.institutionNational Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
dc.contributor.institutionNational Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Chinaen
kaust.authorWu, Yingen
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