Menger fractal structure with negative refraction and sound tunnelling properties

doi:10.1088/2053-1591/ab4c57

	Menger fractal structure with negative refraction and sound tunnelling properties
	Liu Y(刘宇)1,2; Xu WS(徐文帅)1,2; Chen M(陈猛)1,2 ; Pei DL(裴东亮)1,2; Yang T(杨涛)1,2; Jiang H(姜恒)1,2 ; Wang YR(王育人)1,2
刊名	Materials Research Express
	2019-10-18
卷号	6 期号:11
关键词	Menger fractal structure negative refraction acoustic focusing sound tunnelling
ISSN号	2053-1591
DOI	10.1088/2053-1591/ab4c57
英文摘要	Abstract We construct new quasi-three-dimensional fractal acoustic metamaterials based on adoption of the Menger structure, which offers extraordinary parameters such as double-negative properties and a near-zero density. The resulting metamaterials can thus achieve negative refraction, acoustic focusing and sound tunneling. Using the finite element method and the S-parameter retrieval method, the band structures and the effective parameters of these acoustic metamaterials are researched, respectively. The negative refraction property is numerically simulated using a Gaussian beam passing through a double negative prism. A plate lens with a refractive index of n?=??1 is constructed to achieve acoustic focusing and the sound tunnelling ability is verified using the near-zero-density metamaterial. The results show that the Menger fractal structures have excellent acoustic properties and are promising for acoustic applications.
分类号	Q3
语种	英语
WOS记录号	IOP:2053-1591-6-11-AB4C57
其他责任者	陈猛，姜恒
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/80652]
专题	力学研究所_国家微重力实验室
作者单位	1.University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China 2.Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China;
推荐引用方式 GB/T 7714	Liu Y,Xu WS,Chen M,et al. Menger fractal structure with negative refraction and sound tunnelling properties[J]. Materials Research Express,2019,6(11).
APA	刘宇.,徐文帅.,陈猛.,裴东亮.,杨涛.,...&王育人.(2019).Menger fractal structure with negative refraction and sound tunnelling properties.Materials Research Express,6(11).
MLA	刘宇,et al."Menger fractal structure with negative refraction and sound tunnelling properties".Materials Research Express 6.11(2019).