Journal
PHYSICAL REVIEW B
Volume 78, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.195121
Keywords
lenses; metamaterials; optical arrays; optical design techniques; optical materials; optical transfer function; refractive index
Funding
- Funda ao para a Ciencia e a Tecnologia [POSC/EEACPS/61887/2004]
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We propose a superlens formed by an ultradense 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 nonresonant. The theoretical results are fully supported by numerical simulations.
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