Nonlinear properties of meta-dimer comprised of coupled ring resonators
Nonlinear properties of meta-dimer comprised of coupled ring resonators
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由耦合环形谐振器组成的元二聚体的非线性特性
DOI：
10.1088/0022-3727/44/42/425303
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发表时间：
2011-10-26
影响因子：
3.4
通讯作者：
Li, Hongqiang
中科院分区：
文献类型：
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作者：
Fan, Yuancheng;Wei, Zeyong;Li, Hongqiang
我们从实验和理论上研究了片上超材料系统的非线性电磁特性，该系统由两个耦合环形谐振器（CRR）作为元二聚体和一个加载在它们之间的变容管作为非线性介质夹杂物组成。CRR的反对称耦合模式的谐振频率对输入功率敏感，并且可以被调谐到极低的频率，因为当模式被激励时，加载在变容二极管上的感应电压梯度被最大化。在不同的输入功率范围内，实验证明了非线性响应，包括谐振频率的偏移以及滞后效应。这些发现在实现集成等离子体纳米电路或元电子学的亚波长非线性元件方面具有潜在的应用。
We experimentally and theoretically investigate the nonlinear electromagnetic properties of an on-chip metamaterial system comprised of two coupled ring resonators (CRRs) as meta-dimer and a varactor loaded in between them as nonlinear medium inclusion. The resonant frequency of the anti-symmetric coupling mode of CRRs is sensitive to the input power and can be tuned to an extremely low frequency as the induced voltage gradient loaded on the varactor is maximized when the mode is excited. Nonlinear responses, including the shift of resonant frequency as well as hysteresis effects, are demonstrated experimentally in distinct ranges of input powers. The findings have potential applications in implementing subwavelength nonlinear components for integrated plasmonic nanocircuits or metactronics.