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Negative-zero-positive metamaterial with omega-type metal inclusions
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View: Figures


Image of FIG. 1.
FIG. 1.

Characteristics of an edge-coupled SRR /wire (basic cell is shown in inset). (a) Real parts of permeability (solid) and permittivity (dash). (b) Frequency dependence of the transmission of an array. The band gap (gray region) ranging from and is caused by a single negative effective parameter, i.e., negative permittivity.

Image of FIG. 2.
FIG. 2.

(a) Schematic of the omega unit cell. (b) Schematic of omega pattern array with an edge illumination by a plane wave.

Image of FIG. 3.
FIG. 3.

Dispersion characteristics of the negative-zero-positive index structure depicted in Fig. 2(b).

Image of FIG. 4.
FIG. 4.

Effective parameters of negative-zero-positive structure retrieved from the scattering parameters of one unit cell. (a) Refractive index. (b) Impedance. (c) Permittivity. (d) Permeability.

Image of FIG. 5.
FIG. 5.

Propagation phase constant as a function of the substrate permittivity.

Image of FIG. 6.
FIG. 6.

Transmission measurement of the slab. (a) Photograph of slab sample fabricated for transmission measurements. (b) Transmission characteristics of the metamaterial slab.

Image of FIG. 7.
FIG. 7.

Prism model used in simulation. (a) 3D view of prism sample model. (b) Magnified view of one prism model stair, which consists of four cells along the direction and one cell along the direction. (c) Top view of prism model and applied boundaries.

Image of FIG. 8.
FIG. 8.

Electric field magnitude of refracted beam at different frequencies, (a) 10.0 GHz; (b) 12.8 GHz; (c) 15.0 GHz.

Image of FIG. 9.
FIG. 9.

Experimental results of refraction measurement. (a) Photograph of the prismlike prototype. (b) Intensity of the refracted beam as a function of the probing horn angular position.

Image of FIG. 10.
FIG. 10.

(a) Refractive index as a function of frequency. (b) Frequency dependence of the group velocity.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Negative-zero-positive metamaterial with omega-type metal inclusions