通过有损声学超表面实现的可调谐非对称传输

Tunable Asymmetric Transmission via Lossy Acoustic Metasurfaces.

作者信息

Li Yong, Shen Chen, Xie Yangbo, Li Junfei, Wang Wenqi, Cummer Steven A, Jing Yun

机构信息

Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.

Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.

出版信息

Phys Rev Lett. 2017 Jul 21;119(3):035501. doi: 10.1103/PhysRevLett.119.035501. Epub 2017 Jul 18.

DOI:10.1103/PhysRevLett.119.035501

PMID:28777620

Abstract

In this study, we show that robust and tunable acoustic asymmetric transmission can be achieved through gradient-index metasurfaces by harnessing judiciously tailored losses. We theoretically prove that the asymmetric wave behavior stems from loss-induced suppression of high order diffraction. We further experimentally demonstrate this novel phenomenon. Our findings could provide new routes to broaden applications for lossy acoustic metamaterials and metasurfaces.

摘要

在本研究中，我们表明，通过巧妙地利用量身定制的损耗，可通过梯度折射率超表面实现稳健且可调的声学非对称传输。我们从理论上证明，非对称波行为源于损耗引起的高阶衍射抑制。我们进一步通过实验证明了这一新颖现象。我们的发现可为拓展有损声学超材料和超表面的应用提供新途径。