论文标题
使用非重生Willis耦合的声学放大二极管
Acoustic amplifying diode using non-reciprocal Willis coupling
论文作者
论文摘要
我们提出了一个称为声学放大二极管的概念，在组合单个设备中的信号隔离和放大时。该信号在一个方向上呈指数式扩增，而没有反射，并且完全吸收在另一个方向上。在这种情况下，由于阻抗匹配，从两个方向上消除了反射，从而阻止了向后散射到信号源。在这里，我们在实验上使用非股份威利斯耦合的活性超材料进行了扩增的二极管。我们还通过存在互惠和非重生Willis耦合的情况来讨论情况，以提高实施的灵活性。声学放大二极管的概念将使在声音隔离，传感和交流中的应用中进行应用，在这种情况下，非记录可以发挥重要作用。
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.
