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Tuning the effective refractive index of a thin air gap region sandwiched by metallic metamaterials by lateral displacements
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10.1063/1.4812384
/content/aip/journal/jap/113/24/10.1063/1.4812384
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/24/10.1063/1.4812384
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic illustration of the double metallic slabs with periodic slit arrays. The upper and lower slabs are identical with the same geometrical parameters of height , periodicity , and slit width . The gap length and the lateral displacement between the slabs are Δ and Δ, respectively. (b) A triple dielectric layer system corresponding to the configuration of (a). The effective refractive index and the thickness of the upper and the lower layers are = and = , respectively, while those for the middle layer are and = Δ, respectively.

Image of FIG. 2.
FIG. 2.

Transmission spectra for three different alignments of the double metallic slabs with a thin air gap of 35 m. The measured alignments are shown for each spectrum. Here,  = 1360 m,  = 600 m, and  = 160 m. The red dots indicate experimental results, while the blue solid lines show fitted curves for  = / = 3.75.

Image of FIG. 3.
FIG. 3.

Effective refractive index of the air gap region as a function of the lateral shift Δ for various Δ values. The dots indicate experimental data, while the solid lines represent the theoretical predictions of Eq. (4) .

Image of FIG. 4.
FIG. 4.

Calculated transmission at oblique incidence for double-layered cut-though arrays (dotted data) and corresponding triple dielectric layers (solid lines) with different lateral displacement Δ at 0.025 THz. The cut-through slit structure is the same as that in Fig. 2 . The refractive index of the dielectric layers is determined by Eq. (4) .

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/content/aip/journal/jap/113/24/10.1063/1.4812384
2013-06-27
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tuning the effective refractive index of a thin air gap region sandwiched by metallic metamaterials by lateral displacements
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/24/10.1063/1.4812384
10.1063/1.4812384
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