Emitting long-distance spiral airborne sound using low-profile planar acoustic antenna
oleh: Shuxiang Gao, Yunbo Li, Chengrong Ma, Ying Cheng, Xiaojun Liu
| Format: | Article |
|---|---|
| Diterbitkan: | Nature Portfolio 2021-03-01 |
Deskripsi
Acoustic waves that carry orbital angular momentum are difficult to create and maintain at significant distances. Here, the authors present a planar metasurface antenna that enables vortex fields at longer distances.