Systematic realization of double-zero-index phononic crystals with hard inclusions

Abstract A systematic process is described to realize double-zero-index phononic crystals with Dirac-like points experimentally. This type of crystal normally has softer inclusion material than its surroundings medium, allowing mapping into a zero-index medium under certain conditions but also makin...

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Autores principales:	Jaeyub Hyun, Wonjae Choi, Semyung Wang, Choon-su Park, Miso Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c368c39760b442dfaf9ff0bb5d1da14a
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spelling	oai:doaj.org-article:c368c39760b442dfaf9ff0bb5d1da14a2021-12-02T15:07:49ZSystematic realization of double-zero-index phononic crystals with hard inclusions10.1038/s41598-018-25696-y2045-2322https://doaj.org/article/c368c39760b442dfaf9ff0bb5d1da14a2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25696-yhttps://doaj.org/toc/2045-2322Abstract A systematic process is described to realize double-zero-index phononic crystals with Dirac-like points experimentally. This type of crystal normally has softer inclusion material than its surroundings medium, allowing mapping into a zero-index medium under certain conditions but also making experimental implementation difficult. On the other hand, realizing phononic crystals with hard inclusions can be experimentally more feasible, but the mapping conditions cannot be directly applied to hard-inclusion crystals such that mapping is not systematically guaranteed in these cases. Moreover, even if such crystals become realizable, there is a lack of a systematic design process which can be used to optimize or to redesign the crystals, which largely limits their potential applications. In this paper, we discover the essential conditions for realizing phononic crystals with hard inclusions and propose a methodology for the systematic design of these crystals using homogenization based on the effective medium theory. Using the proposed method, a double-zero-index phononic crystal with hard inclusions is optimized and experimentally realized for an underwater ultrasonic wave collimator.Jaeyub HyunWonjae ChoiSemyung WangChoon-su ParkMiso KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jaeyub Hyun Wonjae Choi Semyung Wang Choon-su Park Miso Kim Systematic realization of double-zero-index phononic crystals with hard inclusions
description	Abstract A systematic process is described to realize double-zero-index phononic crystals with Dirac-like points experimentally. This type of crystal normally has softer inclusion material than its surroundings medium, allowing mapping into a zero-index medium under certain conditions but also making experimental implementation difficult. On the other hand, realizing phononic crystals with hard inclusions can be experimentally more feasible, but the mapping conditions cannot be directly applied to hard-inclusion crystals such that mapping is not systematically guaranteed in these cases. Moreover, even if such crystals become realizable, there is a lack of a systematic design process which can be used to optimize or to redesign the crystals, which largely limits their potential applications. In this paper, we discover the essential conditions for realizing phononic crystals with hard inclusions and propose a methodology for the systematic design of these crystals using homogenization based on the effective medium theory. Using the proposed method, a double-zero-index phononic crystal with hard inclusions is optimized and experimentally realized for an underwater ultrasonic wave collimator.
format	article
author	Jaeyub Hyun Wonjae Choi Semyung Wang Choon-su Park Miso Kim
author_facet	Jaeyub Hyun Wonjae Choi Semyung Wang Choon-su Park Miso Kim
author_sort	Jaeyub Hyun
title	Systematic realization of double-zero-index phononic crystals with hard inclusions
title_short	Systematic realization of double-zero-index phononic crystals with hard inclusions
title_full	Systematic realization of double-zero-index phononic crystals with hard inclusions
title_fullStr	Systematic realization of double-zero-index phononic crystals with hard inclusions
title_full_unstemmed	Systematic realization of double-zero-index phononic crystals with hard inclusions
title_sort	systematic realization of double-zero-index phononic crystals with hard inclusions
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/c368c39760b442dfaf9ff0bb5d1da14a
work_keys_str_mv	AT jaeyubhyun systematicrealizationofdoublezeroindexphononiccrystalswithhardinclusions AT wonjaechoi systematicrealizationofdoublezeroindexphononiccrystalswithhardinclusions AT semyungwang systematicrealizationofdoublezeroindexphononiccrystalswithhardinclusions AT choonsupark systematicrealizationofdoublezeroindexphononiccrystalswithhardinclusions AT misokim systematicrealizationofdoublezeroindexphononiccrystalswithhardinclusions
_version_	1718388414962728960

Systematic realization of double-zero-index phononic crystals with hard inclusions

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