Metamaterials as Antireflection Structures

Structurally, metamaterials are usually metal-dielectric composites ordered in ID, 2D, or 3D arrays, where a certain metallic pattern (denoted as electromagnetic 

30 Some metamahaial building blocks ( particles ), a Single split ring, b double split ring, c square fishnet, d elliptical fishnet 

Since the properties of metamaterials and metamaterial-containing structores can be engineered almost at wiU, an obvious question that occurs is if it is possible to use them as superior impedance matching structures. The problem reduces to the use of metamaterials as impedance matching stmctores between the surrounding medium and the material of the detector-active region. 

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