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(a) Schematic diagram of the basic unit cell. The dimensions of the basic unit cell are as follows: , , and . The periodicities along the and directions are 350 and , respectively. (b) Photomicrograph of the omega patterns. (c) Schematic of the bulk metamaterial.
Left axis: experimental (solid black) and simulation (dashed black) transmission spectra of the metamaterial with ten cells stacked along the propagation direction. Right axis: the real (dotted red) and imaginary (dash dotted red) parts of the effective index are also presented.
The phase delay for the metamaterials with ten (solid black) and 14 cells (dashed red) stacked along the propagation direction, respectively.
Oblique transmission spectra of the ten-cell prototype for incident angle values ranging from to . Inset: the incident polarization orientation.
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