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Metamaterial with randomized patterns for negative refraction of electromagnetic waves
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Prism experiment to demonstrate negative refraction. (a) Negative refraction is when an electromagnetic wave impinges on the interface between such matter and air, the wave is refracted to the same side of the surface normal. For negative refraction, the angle between the refracted ray and the surface normal is designated as negative, while for positive refraction of normal matter, the refracted angle is positive. (b) The result of the prism experiment showing a red area with negative angles, indicating negative refraction. (c) The prism for the negative refraction experiment, containing printed patterns that are aperiodical. In the experiment, the electromagnetic wave is incident along direction with a polarization of .

Image of FIG. 2.
FIG. 2.

(Color online) Transmission experiment to retrieve effective constitutive parameters. (a) A block of the metamaterial for the transmission experiment. (b) The retrieved result indicates that in the frequency range 9.35–10.2 GHz, both the real part of and are negative. (c) The printed pattern of the metamaterial is taken from the Roman sculpture Sarcophagus with triumphal procession of Dionysos. The area of the sample in the plane is . We trace the contours of the living beings and made a printed pattern lithographically deposited on each side of a 1-mm-thick circuit board material. The printed boards are then alternately placed with blank boards and hot pressed into a solid-state material.

Image of FIG. 3.
FIG. 3.

(Color online) Prism experiment to demonstrate negative refraction. (a) The map of the northern United States of America is used to trace the pattern for the printed circuit board to make an aperiodic metamaterial. (b) The result of the prism experiment. In the frequency range of 8.42–8.60 GHz, the refracted beam is bent toward negative-angle region. (c) The prism sample of the metamaterial with a printed pattern of northern United States of American map. In the plane, the printed area of the sample is .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Metamaterial with randomized patterns for negative refraction of electromagnetic waves