Ultrasonic wedges for elastic wave bending and splitting without requiring a full band gap

被引：77
作者：
Torres, M
de Espinosa, FRM
Aragón, JL
机构：
[1] CSIC, Inst Fis Aplicada, Madrid 28006, Spain
[2] CSIC, Inst Acust, E-28006 Madrid, Spain
[3] Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, Mexico
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.86.4282
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a novel twinned-square periodic structure for ultrasonic wave bending and splitting that does not require the existence of a complete band gap and plays the role of an ultrasonic wedge. The device allows 45 degrees bending of waves and by adequately switching the twinned structure to an ultrasonic crystal 90 degrees bending is achieved. An extreme refraction law at the grain boundaries is experimentally observed.
引用
收藏
页码：4282 / 4285
页数：4
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