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Experimental measurement of negative index in an all-dielectric metamaterial
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10.1063/1.3232222
/content/aip/journal/apl/95/12/10.1063/1.3232222
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/12/10.1063/1.3232222
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Figures

Image of FIG. 1.
FIG. 1.

(a) Effective permeability (top) and permittivity (bottom) extracted from simulated parameters of one layer of square cross-section high permittivity cylinders. The cylinders are periodically spaced and their permittivity is . This layer is the magnetic building block of our design. Resonances are issued from first two modes of Mie resonances. The effective permeability issued from the first mode is set in the middle of -band frequency range around 10 GHz. Related to this latter mode, the permittivity presents an antiresonance behavior which is inherent in metamaterials. The second mode gives rise to a resonance of the permittivity around 15.7 GHz. (b) Effective permeability (top) and permittivity (bottom) extracted from simulated parameters of a second layer of square cross-section high permittivity cylinders. The permittivity of the cylinders is the same. This layer is the electric building block of our design. Resonances are issued from first three modes of Mie resonances. The effective permittivity issued from the second mode of Mie resonances is set around 10.6 GHz. The first and third modes ( and ) give rise to resonances of the permeability around 6.8 and 15.2 GHz, respectively. Likewise, an antiresonance behavior of the permittivity can be noticed related to these latter modes.

Image of FIG. 2.
FIG. 2.

Permeability (top), permittivity (middle), and index of refraction (bottom) of a one layer ADM extracted from simulated parameters. The metamaterial is made up of two sets of square cross-section high permittivity cylinders. The cylinders are periodically spaced and their permittivity is . One set resonates in the mode of Mie resonances (at 10 GHz), providing the effective permeability, while the other resonates in the mode (at 10.6 GHz), providing the effective permittivity. The permittivity presents an antiresonance behavior associated with a negative imaginary part around 10 GHz, related to the first mode, which is inherent in metamaterials. The shaded area denotes the frequency interval in which the index is negative according to the relation: .

Image of FIG. 3.
FIG. 3.

Permeability (top), permittivity (middle), and index of refraction (bottom) of a one layer ADM extracted from measured parameters. The metamaterial is made up of two sets of square cross-section BST/Mn rods inserted in a PVC matrix. The rods are periodically spaced and their permittivity is . In the same way as in Fig. 2, the shaded area denotes the frequency interval in which the index is negative. Due to the different cross sections of the cylinders, several peaks of resonance distort the line shape of the parameters.

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/content/aip/journal/apl/95/12/10.1063/1.3232222
2009-09-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental measurement of negative index in an all-dielectric metamaterial
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/12/10.1063/1.3232222
10.1063/1.3232222
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