论文标题
基于合成磁性的声音非记录
Sound non-reciprocity based on synthetic magnetism
论文作者
论文摘要
最近，使用时空调制模式实现了合成磁化，从而产生了电荷中性颗粒（例如光子和声子）的非重新磁转向。在这里，我们设计并在实验上展示了一个非重新性声学系统，该系统由三个紧凑型腔与动态和静态耦合相互联系，其中相关的调制诱导了破坏时间逆向对称性的合成磁通量。在旋转波近似中，控制系统的运输特性以有效地实现大型非近代声传输。通过优化耦合强度和调制阶段，我们以45 dB的隔离比和0.85向前传输实现了频率保存的单向运输。我们的结果开放，可以实现具有高效率和较大隔离的声学非注册技术，并提供了通往浮光拓扑绝缘子的途径。
Synthetic magnetism has been recently realized using spatiotemporal modulation patterns, producing non-reciprocal steering of charge-neutral particles such as photons and phonons. Here, we design and experimentally demonstrate a non-reciprocal acoustic system composed of three compact cavities interlinked with both dynamic and static couplings, in which phase-correlated modulations induce a synthetic magnetic flux that breaks time-reversal symmetry. Within the rotating wave approximation, the transport properties of the system are controlled to efficiently realize large non-reciprocal acoustic transport. By optimizing the coupling strengths and modulation phases, we achieve frequency-preserved unidirectional transport with 45-dB isolation ratio and 0.85 forward transmission. Our results open to the realization of acoustic nonreciprocal technologies with high efficiency and large isolation, and offer a route towards Floquet topological insulators for sound.
