利用非互易Willis耦合的声学放大二极管
Acoustic amplifying diode using non-reciprocal Willis coupling
AI总结：
提出一种声学放大二极管，利用非互易Willis耦合实现单方向无反射指数放大与反向完全吸收，实验验证其隔离与放大功能，有望应用于声隔离、传感和通信。
摘要：
我们提出了一种称为声学放大二极管的概念，将信号隔离和放大结合在单个设备中。信号在一个方向上无反射地指数放大，在另一个方向上被完全吸收。在这种情况下，由于阻抗匹配，反射从两个方向都被消除，从而防止了对信号源的反向散射。在这里，我们通过具有非互易Willis耦合的有源超材料实验演示了放大二极管。我们还讨论了同时存在互易和非互易Willis耦合的情况，以实现更大的实现灵活性。声学放大二极管的概念将推动在声隔离、传感和通信中的应用，其中非互易性可以发挥重要作用。
英文摘要：
We propose a concept called acoustic amplifying diode in combining both signal isolation and amplification in a single device. The signal is exponentially amplified in one direction with no reflection and is completely absorbed in another. In this case, the reflection is eliminated from the device in both directions due to impedance matching, preventing backscattering to the signal source. Here, we experimentally demonstrate the amplifying diode using an active metamaterial with non-reciprocal Willis coupling. We also discuss the situation with the presence of both reciprocal and non-reciprocal Willis couplings for more flexibility in implementation. The concept of acoustic amplifying diode will enable applications in sound isolation, sensing and communication, in which non-reciprocity can play an important role.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
