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Nonlinear and tunable metamaterials

机译:非线性和可调谐超材料

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We review the recent experimental results from our Nonlinear Physics Center on tunability and nonlinear response of microstructured metamaterials with negative refractive index. We suggest and design new types of tunable metamaterials exhibiting either nonlinear magnetic or nonlinear electric response at microwave frequencies. By introducing a varactor diode as a nonlinear element within each resonator, we shift the frequency of either magnetic or electric resonance by changing the incident power. We also discuss a novel approach for efficient tuning of the transmission characteristics of metamaterials through a continuous adjustment of the lattice structure, the so-called structural tunability. Some of the tuning mechanisms discussed here can be suitable for scaling toward optical wavelengths with useful applications realizable in a wide frequency range.
机译:我们回顾了我们非线性物理中心关于具有负折射率的微结构超材料的可调性和非线性响应的最新实验结果。我们建议并设计在微波频率下表现出非线性磁响应或非线性电响应的新型可调谐超材料。通过在每个谐振器中引入一个变容二极管作为非线性元件,我们可以通过改变入射功率来改变磁共振或电谐振的频率。我们还讨论了通过连续调整晶格结构(即所谓的结构可调性)来有效调整超材料的传输特性的新颖方法。此处讨论的某些调谐机制可能适用于朝着光学波长方向扩展,并具有可在较宽的频率范围内实现的有用应用。

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