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首页> 外文期刊>Journal of nonlinear optical physics & materials >Role of the linear losses and nonlinear magnetic susceptibility in the modulational instability in nonlinear metamaterials
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Role of the linear losses and nonlinear magnetic susceptibility in the modulational instability in nonlinear metamaterials

机译：线性损耗和非线性磁化率在非线性超材料的调制不稳定性中的作用

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摘要

We analyze modulation instability (MI) in lossy metamaterials (MMs) with both nonlinear polarization and nonlinear magnetization. A detailed discussion on the role of the nonlinear electric polarization, nonlinear magnetic susceptibility and linear loss on the MI is presented. It is found that the nonlinear magnetization and linear loss play an important role in determining the MI in nonlinear MMs. Linear stability analysis predicts that MI may occur in the MMs with self-defocusing nonlinearity due to the negative-index of MMs. In particular, the nonlinear magnetic susceptibility changes the generation condition of MI seriously, it can be used to enhance or depress the MI depending on the sign of the nonlinear magnetic susceptibility. Finally, the influence of the loss in MMs on the MI is discussed.
机译：我们分析具有非线性极化和非线​​性磁化的有损超材料（MM）中的调制不稳定性（MI）。详细讨论了非线性极化，非线性磁化率和线性损耗对MI的作用。发现非线性磁化和线性损耗在确定非线性MM中的MI方面起着重要作用。线性稳定性分析预测，由于MM的负折射率，具有自散焦非线性的MM可能会发生MI。特别是，非线性磁化率严重改变了MI的生成条件，可以根据非线性磁化率的符号来提高或降低MI。最后，讨论了MM损耗对MI的影响。

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