发表机构
College of Applied Sciences, Shenzhen University; Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology, and College of Engineering Physics, Shenzhen Technology University; The Center for Advanced Quantum Studies and School of Physics and Astronomy, Beijing Normal University; Key Laboratory of Multiscale Spin Physics, Beijing Normal University; School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China; School of Mechanical and Electrical Engineering, Chengdu University of Technology（深圳大学应用科学学院; 深圳技术大学工程物理学院、强激光应用技术中心及超强激光与先进材料技术深圳市重点实验室; 北京师范大学天文与物理学院及量子高等研究院; 北京师范大学多尺度自旋物理重点实验室; 电子科技大学电子薄膜与集成器件国家重点实验室及物理学院; 成都理工大学机械电气工程学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究在铁磁纳米环中发现由涡核回旋与方位角自旋波模式强耦合产生的扭曲磁子频率梳，可通过孔尺寸与面内磁场调谐，为非线性磁子学提供通用平台，具频率梳生成与精密计量应用潜力。
AI 中文摘要
我们报道了铁磁纳米环中扭曲磁子频率梳（tMFCs）及其高阶模式的出现，该现象源于涡核回旋与方位角自旋波模式之间的强非线性耦合。梳齿携带由整数间隔量子数表征的不同轨道角动量，其形成遵循能量与角动量同时守恒的选择定则。我们证实，孔直径是强大的调谐参数：减小孔尺寸可保留常规tMFC，而增大孔尺寸会引入额外磁子模式，通过四波混频显著加密梳齿，使边带数量提升一个数量级。此外，外部面内磁场可通过位移涡核并改变其约束势，实现梳齿间距的连续可逆调谐，而孔诱导的几何钉扎会在相反磁场极性下产生非对称切换与磁滞。我们的结果确立tMFC为非线性磁子学的通用平台，在可调谐频率梳生成与精密计量领域具有潜在应用。
英文摘要
We systematically investigate the emergence of twisted magnon frequency combs (tMFCs) and their higher-order modes arising from strong nonlinear coupling between vortex-core gyration and azimuthal spin-wave modes in ferromagnetic nanorings. The comb spacing is set by the gyrotropic frequency, which is controlled by both the size of the central hole and external magnetic fields. Remarkably, for the larger hole diameter (50 nm), an additional magnon mode emerges, leading to additional tMFC families. We also demonstrate that the selection rules still hold for different nanorings. In addition, the external in-plane magnetic field provides an effective means to tune the tMFC, while the response strongly depends on the nanostructure geometry. The nanodisk shows an approximately symmetric response under field reversal, whereas the response of nanorings depends strongly on the size of the central hole. For a small hole diameter (5 nm), the low-field response becomes asymmetric, and the tMFC spacing increases with field magnitude over the higher field branches. A larger hole diameter (50 nm) raises the gyrotropic frequency, yielding a sparser sideband structure near the drive frequency. Our results show that ferromagnetic nanorings support geometrically and magnetically tunable tMFCs.
Comments7 pages, 6 figures
