Magnon-photon strong coupling for tunable microwave circulators
Magnon-photon strong coupling for tunable microwave circulators
复制标题
DOI：
10.1103/physreva.101.043842
复制
发表时间：
2019-12
影响因子：
2.9
通讯作者：
Na Zhu;Xu Han;Chang-ling Zou;Mingrui Xu;H. Tang
中科院分区：
文献类型：
--
作者：
Na Zhu;Xu Han;Chang-ling Zou;Mingrui Xu;H. Tang
我们提出了一个通用的理论框架来描述多模腔磁振子系统中的非互易微波环流，并评估实际环行器器件的最佳性能。我们表明，高隔离度（$g56$ dB），极低的插入损耗（$l0.05$ dB），和灵活的带宽控制，可以潜在地实现在高品质因数超导腔为基础的磁振子平台。这些循环特性与不同的自旋密度的材料进行了分析。对于高自旋密度材料，如钇铁石榴石，强耦合操作制度可以利用，以获得更宽的循环带宽。我们还提供了一个高度集成的低自旋密度材料（钒四氰基乙烯）的窄带环行器操作，这可能有利于噪声敏感的量子微波测量的实用设计原则。这一理论可以推广到其他耦合系统，并为实现经典和量子应用的可调谐微波非互易性提供设计指导。
We present a generic theoretical framework to describe nonreciprocal microwave circulation in a multimode cavity magnonic system and assess the optimal performance of practical circulator devices. We show that high isolation ($g56$ dB), extremely low insertion loss ($l0.05$ dB), and flexible bandwidth control can be potentially realized in high-quality-factor superconducting cavity based magnonic platforms. These circulation characteristics are analyzed with materials of different spin densities. For high-spin-density materials such as yttrium iron garnet, the strong-coupling operation regime can be harnessed to obtain a broader circulation bandwidth. We also provide practical design principles for a highly integratable low-spin-density material (vanadium tetracyanoethylene) for narrow-band circulator operation, which could benefit noise-sensitive quantum microwave measurements. This theory can be extended to other coupled systems and provide design guidelines for achieving tunable microwave nonreciprocity for both classical and quantum applications.