一种非线性磁振子纳米环谐振器
A nonlinear magnonic nano-ring resonator
摘要：
近年来，磁振子学领域吸引了越来越多的兴趣，其目的是在数据处理设备中使用自旋波作为载体。我们提出并研究了微磁非线性纳米级磁振子环谐振器设备，使磁振子逻辑门和神经形态磁振子电路的实现。在线性状态下，该器件利用临界共振耦合现象有效地抑制自旋波传输，从而表现出陷波滤波器的行为。通过增加自旋波输入功率，共振频率被移动，导致传输曲线，取决于频率，让人想起神经元的激活函数或显示功率限制器的特性。建立了描述磁振子环形谐振器在线性和非线性区域传输曲线的解析理论，并通过全面的微磁学研究进行了验证。所提出的磁振子环形谐振器为非常规磁振子电路提供了一个多功能的非线性构建模块。
英文摘要：
The field of magnonics, which aims at using spin waves as carriers in data processing devices, has attracted increasing interest in recent years. We present and study micromagnetically a nonlinear nanoscale magnonic ring resonator device for enabling implementations of magnonic logic gates and neuromorphic magnonic circuits. In the linear regime, this device efficiently suppresses spin-wave transmission using the phenomenon of critical resonant coupling, thus exhibiting the behavior of a notch filter. By increasing the spin-wave input power, the resonance frequency is shifted leading to transmission curves, depending on the frequency, reminiscent of the activation functions of neurons or showing the characteristics of a power limiter. An analytical theory is developed to describe the transmission curve of magnonic ring resonators in the linear and nonlinear regimes and validated by a comprehensive micromagnetic study. The proposed magnonic ring resonator provides a multi-functional nonlinear building block for unconventional magnonic circuits.
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