Negative refraction of longitudinal waves in a two-dimensional solid-solid phononic crystal

被引：55
|
作者：
Croenne, C. [1 ,3 ]
Manga, E. D. [2 ,3 ,4 ]
Morvan, B. [2 ,3 ]
Tinel, A. [2 ,3 ]
Dubus, B. [1 ,3 ]
Vasseur, J. [1 ,3 ]
Hladky-Hennion, A. -C. [1 ,3 ]
机构：
[1] CNRS, Inst Elect Microelect & Nanotechnol, UMR 8520, F-59046 Lille, France
[2] Univ Havre, Lab Ondes & Milieux Complexes, CNRS, Grp Ondes Acoust,FRE 3102, F-76610 Le Havre, France
[3] CNRS, FR 3110, F-76610 Le Havre, France
[4] Univ Francois Rabelais Tours, Lab Imagerie & Cerveau, UMR U 930, Equipe Caracterisat Ultrasonore & Piezoelect, F-41034 Blois, France
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 05期
关键词：
SONIC CRYSTALS; ACOUSTIC-WAVES;
D O I：
10.1103/PhysRevB.83.054301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Negative refraction of longitudinal waves is evidenced experimentally in a two-dimensional phononic crystal (PC) with a solid matrix. The PC is made of a triangular arrangement of steel rods embedded in epoxy. The dispersion curves present a branch with a negative slope, corresponding to a mixed mode with a predominantly longitudinal behavior. Experiments are carried out on a prism-shaped PC inserted inside an epoxy block, and excited with a longitudinal transducer. Measurement of the refraction angle at the output side of the PC shows the negative refraction of longitudinal waves through a solid PC. Theoretical results agree quite well with the experimental results. The possibility to use the PC in a fluid background is verified numerically, with the simulation of a focusing flat lens.
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页数：5
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