Constructing metamaterials from subwavelength pixels with constant indices product

Abstract : We investigate a two-dimensional metamaterial template constructed from different pixels through a conservation law of effective indices: If the product of refractive indices along the principal axes is invariant for different anisotropic materials in a two-dimensional space, the product of indices of the effective medium remains constant after mixing these materials. Such effective media of constant indices product can be implemented using metamaterial structures. The orientation of the metamaterial structure in a single pixel controls the direction of the principal axis of the effective medium. Different pixels are assembled into an array to obtain reconfigurable anisotropy of the effective medium. These considerations would be useful for constructing reconfigurable metamaterials and transformation media with area-preserving maps
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Jensen Li, Feng Miao, Zixian Liang, Sebastien Guenneau. Constructing metamaterials from subwavelength pixels with constant indices product. Optics Express, Optical Society of America, 2015, 23, pp.7140-7151. ⟨10.1364/OE.23.007140⟩. ⟨hal-01217462⟩

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