Extremely low frequency plasmons in metallic mesostructures
Extremely low frequency plasmons in metallic mesostructures
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DOI：
10.1103/physrevlett.76.4773
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发表时间：
1996-06-17
影响因子：
8.6
通讯作者：
Youngs, I
中科院分区：
文献类型：
--
作者：
Pendry, JB;Holden, AJ;Youngs, I
等离子体激元是在可见光和近紫外波段金属中一种已被充分确认的集体激发，但在低得多的频率下，耗散会消除等离子体激元的所有痕迹，并出现典型的德鲁德行为。我们提出一种将等离子体频率降低到远红外甚至吉赫兹波段的机制：由极细的导线构成的周期性结构稀释了电子的平均浓度，并通过自感显著提高了有效电子质量。计算重现了关键特征并证实了我们的分析理论。这种新结构具有在吉赫兹波段以前未被观察到的新特性，包括对超导特性可能产生的一些影响。
The plasmon is a well established collective excitation of metals in the visible and near UV, but at much lower frequencies dissipation destroys all trace of the plasmon and typical Drude behavior sets in. We propose a mechanism for depression of the plasma frequency into the far infrared or even GHz band: Periodic structures built of very thin wires dilute the average concentration of electrons and considerably enhance the effective electron mass through self-inductance. Computations replicate the key features and confirm our analytic theory. The new structure has novel properties not observed before in the GHz band, including some possible impact on superconducting properties.