Controlling the polarization state of light with a dispersion-free metastructure

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Abstract

By combining the advantages of both a metallic metamaterial and a dielectric interlayer, we demonstrate the general mechanism to construct the dispersion-free metastructure, in which the intrinsic dispersion of the metallic structures is perfectly cancelled out by the thickness-dependent dispersion of the dielectric spacing layer. As examples to apply this concept, a broadband quarter-wave plate and a half-wave plate are demonstrated. By selecting the structural parameters, the polarization state of light can be freely tuned across a broad frequency range, and all of the polarization states on the Poincaré sphere can be realized dispersion free.

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Jiang, S. C., Xiong, X., Hu, Y. S., Hu, Y. H., Ma, G. B., Peng, R. W., … Wang, M. (2014). Controlling the polarization state of light with a dispersion-free metastructure. Physical Review X, 4(2). https://doi.org/10.1103/PhysRevX.4.021026

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