{"title":"Omnidirectionally impedance-matched phononic crystals for full-parameter transformation acoustics","authors":"Chenkai Liu, Jie Luo, Xiaozhou Liu, Yun Lai","doi":"10.1007/s11433-024-2449-x","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, we present an approach to realize full-parameter transformation acoustic media utilizing phononic crystals instead of metamaterials, which has the exceptional advantages of omnidirectional impedance matching and configurable dispersion surfaces. By employing a sandwich structure, we demonstrate phononic crystals that exhibit tunable shifted elliptical equal frequency contours and nearly omnidirectional impedance matching simultaneously. Two typical acoustic devices, including a beam shifter and an illusionary scatterer of different size, are demonstrated with the phononic crystal approach. Our work provides a practical platform for implementing full-parameter transformation acoustics, opening avenues for versatile applications such as advanced acoustic imaging and stealth technologies.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 5","pages":""},"PeriodicalIF":7.5000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Physics, Mechanics & Astronomy","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11433-024-2449-x","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, we present an approach to realize full-parameter transformation acoustic media utilizing phononic crystals instead of metamaterials, which has the exceptional advantages of omnidirectional impedance matching and configurable dispersion surfaces. By employing a sandwich structure, we demonstrate phononic crystals that exhibit tunable shifted elliptical equal frequency contours and nearly omnidirectional impedance matching simultaneously. Two typical acoustic devices, including a beam shifter and an illusionary scatterer of different size, are demonstrated with the phononic crystal approach. Our work provides a practical platform for implementing full-parameter transformation acoustics, opening avenues for versatile applications such as advanced acoustic imaging and stealth technologies.
期刊介绍：
Science China Physics, Mechanics & Astronomy, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research.
Science China Physics, Mechanics & Astronomy, is published in both print and electronic forms. It is indexed by Science Citation Index.
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Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested.
Research papers report on important original results in all areas of physics, mechanics and astronomy.
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