Unidirectional amplification with acoustic non-Hermitian space−time varying metamaterial
oleh: Xinhua Wen, Xinghong Zhu, Alvin Fan, Wing Yim Tam, Jie Zhu, Hong Wei Wu, Fabrice Lemoult, Mathias Fink, Jensen Li
| Format: | Article |
|---|---|
| Diterbitkan: | Nature Portfolio 2022-01-01 |
Deskripsi
Exquisite control of loss and gain in non-Hermitian systems allows waves to propagate in unusual and useful ways. Here, unidirectional amplification is achieved in an acoustic metamaterial by dynamically varying the gain and loss with modulation phase delay between different metaatoms.