Negative Refractive Index in Optics of Metal-Dielectric Composites

Abstract

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 micrometer. The inverted structure of paired voids in metal films may 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 is discussed.

39 pages, 17 figures, 24 equations

References in corpus (5)

• Negative Index of Refraction in Optical Metamaterials
• Demonstration of Near-Infrared Negative-Index Materials
• Magnetic metamaterials at telecommunication and visible frequencies
• Near-sighted superlens
• Resonant light interaction with plasmonic nanowire systems

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