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.

Comments

© Physical Review X. Original version available at: http://doi.org/10.1103/PhysRevX.4.031042

Publication Title

Physical Review X

DOI

10.1103/PhysRevX.4.031042

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