With minimal Joule loss, magnetic insulator-based quantized spin-waves or magnons are becoming increasingly popular for device applications including logic-circuits and signal processing. The parametric excitation-based nonlinear behavior that plays an important role in such applications is also interesting from a physics perspective. In this work, we demonstrate quantitative prediction of the threshold microwave-field needed for initiating nonlinear behavior in the presence of a secondary microwave frequency. This would allow the in situ control of non-linearity and, hence, prove to be useful for a wide range of applications, especially those involving microwave devices. The fine structures, appearing in the threshold-field upon variation in the frequency of the secondary frequency, have been demonstrated using simulations and explained analytically. The impact of the magnon phase relative to the pump is also quantitatively determined.

中文翻译：

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使用二次微波频率操纵非线性磁振子效应

由于焦耳损失最小，基于磁性绝缘体的量化自旋波或磁振子在包括逻辑电路和信号处理在内的设备应用中越来越受欢迎。从物理学的角度来看，在此类应用中发挥重要作用的基于参数激励的非线性行为也很有趣。在这项工作中，我们展示了在存在次级微波频率的情况下启动非线性行为所需的阈值微波场的定量预测。这将允许对非线性进行原位控制，因此被证明可用于广泛的应用，尤其是那些涉及微波设备的应用。在二次频率的频率变化时出现在阈值场中的精细结构，已经使用模拟进行了证明并进行了分析解释。磁振子相相对于泵的影响也被定量确定。