由具有极端有效参数的超材料制成的超级透镜
Superlens made of a metamaterial with extreme effective parameters
摘要：
我们提出了一个由超密集的交叉金属线阵列形成的超透镜。它表明，由于交叉线之间的异常相互作用，结构化衬底的特征在于由一个非常高的折射率和支持强烈限制导模与非常短的传播波长。从理论上证明，这种结构材料的平板构成超透镜，可以补偿由自由空间传播引入的衰减，并恢复源的亚波长细节。所提出的装置的带宽可以是相当显著的，因为结构化衬底的响应是非谐振的。数值模拟结果完全支持理论结果。
英文摘要：
We propose a superlens formed by an ultra-dense array of crossed metallic wires. It is demonstrated that due to the anomalous interaction between crossed wires, the structured substrate is characterized by an anomalously high index of refraction and supports strongly confined guided modes with very short propagation wavelengths. It is theoretically proven that a planar slab of such structured material makes a superlens that may compensate for the attenuation introduced by free-space propagation and restore the subwavelength details of the source. The bandwidth of the proposed device can be quite significant since the response of the structured substrate is non-resonant. The theoretical results are fully supported by numerical simulations.
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