Controlling acoustic wave with cylindrically-symmetric gradient-index system

• 作者: 张哲 李睿奇 梁彬 程建春 邹欣晔
• 来源期刊: 中国物理B（英文版）
• 关键词: gradient-index media wave propagation acoustic refractive index wave manipulation
• 年，卷（期）: 2015,（2）
• 页码范围: 024301-1-024301-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/024301

摘要

We present a detailed theoretical description of wave propagation in an acoustic gradient-index system with cylindrical symmetry and demonstrate its potential numerically to control acoustic waves in different ways. The trajectory of acoustic wave within the system is derived by employing the theory of geometric acoustics, and the validity of the theoretical descriptions is verified numerically by using the finite element method simulation. The results show that by tailoring the distribution function of refractive index, the proposed system can yield tunable manipulation on acoustic waves, such as acoustic bending, trapping, and absorbing.