Self-collimation of Ultrasonic Waves in a Two-dimensional Prism-shaped Phononic Crystal

被引：3
|
作者：
Kang, Hwi Suk [1 ]
Lee, Kang Il [1 ]
机构：
[1] Kangwon Natl Univ, Dept Phys, Chunchon 24341, South Korea
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2020年 / 77卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
Acoustic metamaterial; Phononic crystal; Band structure; Negative refraction; Self-collimation; BAND-STRUCTURE;
D O I：
10.3938/jkps.77.510
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The self-collimation of ultrasonic waves in a two-dimensional prism-shaped phononic crystal (PC) with a square lattice immersed in water was theoretically and experimentally investigated. The acoustic pressure fields at the frequencies of the first and the second pass bands were calculated with and without the PC in the acoustic path by using the finite element method. The normalized pressure distributions of the ultrasonic waves transmitted through water only and through the PC were theoretically and experimentally obtained along the direction perpendicular to the beam axis. We demonstrated self-collimation and directivity enhancement of the ultrasonic waves in the two-dimensional prism-shaped PC.
引用
收藏
页码：510 / 514
页数：5
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