DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Dongwoo | - |
dc.contributor.author | Cho, Choonlae | - |
dc.contributor.author | Mun, Jungho | - |
dc.contributor.author | Park, Namkyoo | - |
dc.contributor.author | Rho, Junsuk | - |
dc.date.accessioned | 2018-12-04T01:52:39Z | - |
dc.date.available | 2018-12-04T01:52:39Z | - |
dc.date.created | 2018-11-12 | - |
dc.date.issued | 2018-10 | - |
dc.identifier.issn | 0003-6951 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/94277 | - |
dc.description.abstract | We demonstrate an acoustic generalized Eaton lens that steers an acoustic wave to a desired angle, to propose a design method for gradient-index devices using the sub-wavelength structure to shape an acoustic wave. Based on investigations on the effective parameter with several methods: the S-parameter retrieval method, Floquet-Bloch calculations, and multiple scattering theory (MST) for the cylindrical rigid rod structure, we speculate the design process to realize inhomogeneous refractive index distribution. For realization of a high effective index (similar to 2), the MST design inevitably fails, whereas the Floquet-Bloch calculations and S-parameter retrieval give identical results. By appropriately designing a two-dimensional array of cylindrical PMMA rods, we experimentally verify the acoustic generalized Eaton lenses for steering angles of 15 degrees and 45 degrees. Furthermore, the use of non-resonant metamaterials enables the proposed devices to work in the broad frequency range from 4 to 8 kHz. Published by AIP Publishing. | - |
dc.language | English | - |
dc.publisher | AMER INST PHYSICS | - |
dc.relation.isPartOf | APPLIED PHYSICS LETTERS | - |
dc.title | Demonstration of steering acoustic waves by generalized Eaton lens | - |
dc.type | Article | - |
dc.identifier.doi | 10.1063/1.5051439 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | APPLIED PHYSICS LETTERS, v.113, no.16 | - |
dc.identifier.wosid | 000447774800013 | - |
dc.citation.number | 16 | - |
dc.citation.title | APPLIED PHYSICS LETTERS | - |
dc.citation.volume | 113 | - |
dc.contributor.affiliatedAuthor | Lee, Dongwoo | - |
dc.contributor.affiliatedAuthor | Mun, Jungho | - |
dc.contributor.affiliatedAuthor | Rho, Junsuk | - |
dc.identifier.scopusid | 2-s2.0-85055265904 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 0 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | MAXWELL FISH-EYE | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Physics | - |
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