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      A discussion on the interpretation and characterization of metafilms/metasurfaces: The two-dimensional equivalent of metamaterials

      , , , , ,
      Metamaterials
      Elsevier BV

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          Composite Medium with Simultaneously Negative Permeability and Permittivity

          We demonstrate a composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region in the microwave regime with simultaneously negative values of effective permeability &mgr;(eff)(omega) and permittivity varepsilon(eff)(omega). This structure forms a "left-handed" medium, for which it has been predicted that such phenomena as the Doppler effect, Cherenkov radiation, and even Snell's law are inverted. It is now possible through microwave experiments to test for these effects using this new metamaterial.
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            Determination of Effective Permittivity and Permeability of Metamaterials from Reflection and Transmission Coefficients

            , , (2001)
            We analyze the reflection and transmission coefficients calculated from transfer matrix simulations on finite lenghts of electromagnetic metamaterials, to determine the effective permittivity and permeability. We perform this analysis on structures composed of periodic arrangements of wires, split ring resonators (SRRs) and both wires and SRRs. We find the recovered frequency-dependent permittivity and permeability are entirely consistent with analytic expressions predicted by effective medium arguments. Of particular relevance are that a wire medium exhibits a frequency region in which the real part of permittivity is negative, and SRRs produce a frequency region in which the real part of permeability is negative. In the combination structure, at frequencies where both the recovered real part of permittivity and permeability are simultaneously negative, the real part of the index-of-refraction is found also to be unambigously negative.
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              Robust method to retrieve the constitutive effective parameters of metamaterials

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                Author and article information

                Journal
                Metamaterials
                Metamaterials
                Elsevier BV
                18731988
                October 2009
                October 2009
                : 3
                : 2
                : 100-112
                Article
                10.1016/j.metmat.2009.08.001
                e137f1a7-7b23-493c-aac1-203d9dd4a3d4
                © 2009

                http://www.elsevier.com/tdm/userlicense/1.0/

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