2008•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEOpen access

Negative refraction and subwavelength focusing using left-handed composite metamaterials

Ekmel Özbay, Koray Aydın

Abstract

We review experimental studies performed on left-handed metamaterials (LHM) at microwave frequencies. The metamaterial structure is composed of periodic arrays of split-ring resonators and wire meshes and exhibits a left-handed propagation band at frequencies of negative permittivity and negative permeability. Negative refraction is verified using prism shaped LHM and also by beam-shifting method. Subwavelength focusing of a point source is achieved with a resolution of 0.13λ through a flat LHM superlens.

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Key concepts: Metamaterial, Negative refraction, Superlens, Optics, Split-ring resonator, Permittivity, Left handed, Physics