Document Type
Article
Publication Date
1-1-2014
Abstract
We introduce here the concept of acoustic parity-time (PT) symmetry and demonstrate the extraordinary scattering characteristics of the acoustic PT medium. On the basis of exact calculations, we show how an acoustic PT -symmetric medium can become unidirectionally transparent at given frequencies. Combining such a PT -symmetric medium with transformation acoustics, we design two-dimensional symmetric acoustic cloaks that are unidirectionally invisible in a prescribed direction. Our results open new possibilities for designing functional acoustic devices with directional responses.
Recommended Citation
Zhu, Xuefeng, Hamidreza Ramezani, Chengzhi Shi, Jie Zhu, and Xiang Zhang. "P t-symmetric acoustics." Physical Review X 4, no. 3 (2014): 031042. http://doi.org/10.1103/PhysRevX.4.031042
Publication Title
Physical Review X
DOI
10.1103/PhysRevX.4.031042
Comments
© Physical Review X. Original version available at: http://doi.org/10.1103/PhysRevX.4.031042