Negative refraction of acoustic waves in two-dimensional sonic crystals

被引：94

作者：

Feng, L ^{[1
]}

Liu, XP

Chen, YB

Huang, ZP

Mao, YW

Chen, YF

Zi, J

Zhu, YY

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Nanjing 210093, Peoples R China

[3] Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.72.033108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Negative refractions of acoustic waves in a two-dimensional (2D) sonic crystal were studied both experimentally and theoretically. By calculating the acoustic band structure and equifrequency surfaces, we theoretically analyzed the acoustic single-beam negative refraction in the first band operating in the ultrasonic regime. A 2D square sonic crystal was constructed with 2.0-mm-diam steel cylinders arranged as square arrays of 2.5 mm lattice constant. A scanning transmission measurement of spatial distribution was carried out to establish the acoustic refraction of a single Gaussian beam. It was demonstrated that the negative refraction is strongly dependent on both frequencies and incident angles, which shows great potential in acoustic devices.

引用

页数：4

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