Devaux Thibaut, Cebrecos Alejandro, Richoux Olivier, Pagneux Vincent, Tournat Vincent
Laboratoire d'Acoustique de l'Université du Mans, LAUM UMR 6613, CNRS, Le Mans Université, Av. O. Messiaen, 72085, Le Mans, France.
Nat Commun. 2019 Jul 23;10(1):3292. doi: 10.1038/s41467-019-11305-7.
Systems capable of breaking wave transmission reciprocity have recently led to tremendous developments in wave physics. We report herein on a concept that enables one-way transmission of ultrasounds, an acoustic diode, by relying on the radiation pressure effect. This effect makes it possible to reconfigure a multilayer system by significantly deforming a water-air interface. Such a reconfiguration is then used to achieve an efficient acoustic transmission in a specified direction of propagation but not in the opposite, hence resulting in a highly nonreciprocal transmission. The corresponding concept is experimentally demonstrated using an aluminum-water-air-aluminum multilayer system, providing the means to overcome key limitations of current nonreciprocal acoustic devices. We also demonstrate that this diode functionality can even be extended to the design and operations of an acoustic switch, thus paving the way for new wave control possibilities, such as those based on acoustic transistors, phonon computing and amplitude-dependent filters.
能够打破波传播互易性的系统最近在波动物理学领域带来了巨大的发展。我们在此报告一种基于辐射压力效应实现超声波单向传输的概念，即声二极管。这种效应能够通过显著使水 - 空气界面变形来重新配置多层系统。然后利用这种重新配置在特定传播方向上实现高效的声传输，而在相反方向则不然，从而实现高度非互易的传输。使用铝 - 水 - 空气 - 铝多层系统通过实验证明了相应的概念，为克服当前非互易声学器件的关键限制提供了手段。我们还证明这种二极管功能甚至可以扩展到声开关的设计和操作，从而为新的波控制可能性铺平道路，例如基于声晶体管、声子计算和幅度依赖滤波器的可能性。
