Negative refractive index in optics of metal-dielectric composites

By Alexander V. Kildishev, Wenshan Cai, U. Chettiar, Hsiao-Kuan Yuan, A. Sarychev, Vladimir P. Drachev, Vladimir M. Shalaev. 2005

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Specially designed metal-dielectric composites can have a negative refractive index in the optical range. Specifically, it is shown that arrays of single and paired nanorods can provide such negative refraction. For pairs of metal rods, a negative refractive index has been observed at 1.5 µm. The inverted structure of paired voids in metal films can also exhibit a negative refractive index. A similar effect can be accomplished with metal strips in which the refractive index can reach −2. The refractive index retrieval procedure and the critical role of light phases in determining the refractive index are discussed.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/a9cb6a7094520b77b5b54518d3cd0855143875d0