Limits...
Transmitting information of an object behind the obstacle to infinity.

Xu BB, Jiang WX, Meng LL, Cui TJ - Sci Rep (2015)

Bottom Line: We propose an illusion device that transforms a metallic cylinder into a Luneburg lens by using transformation optics.In order to realize the required-anisotropic parameters with high permittivity and low permeability, we design embedded split-ring resonators (SRRs) to increase the permittivity of the traditional SRR structures.In experiments, we fabricate and measure the transformed lens, and the tested results agree well with the numerical simulations and theoretical predictions.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.

ABSTRACT
We propose an illusion device that transforms a metallic cylinder into a Luneburg lens by using transformation optics. Such a transformed focusing lens guides electromagnetic waves to propagate around the central metallic cylinder smoothly and be focused on one spot, and thus the information of an object behind the obstacle can be transmitted to infinity. In order to realize the required-anisotropic parameters with high permittivity and low permeability, we design embedded split-ring resonators (SRRs) to increase the permittivity of the traditional SRR structures. In experiments, we fabricate and measure the transformed lens, and the tested results agree well with the numerical simulations and theoretical predictions. The proposed transformation lens can mimic some properties of Einstein gravitational lens because their wave propagation behaviors are very similar.

No MeSH data available.


Related in: MedlinePlus

The test platform and fabricated sample.
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f5: The test platform and fabricated sample.

Mentions: As pointed out in above, the thickness of each layer is 3 mm. In real fabrication, it is very difficult to etch the metallic structures on the curving dielectric substrates. Hence, we employ 12 sub-layers to compose each layer. The thickness of each sub-layer is 0.25 mm. The metallic SRR structures are etched on the sixth sub-layer, which is in the center of each layer. The thickness of the metallic structures, 0.035 mm, is negligible, compared to the thickness of the dielectric layers. The fabricated lens is shown in Fig. 5(b). A copper cylinder is put in the center of the transformed lens serving as an obstacle thus the incident waves cannot penetrate into it. Here we use F4B as dielectric substrates with the relative permittivity of 2.65 and a loss tangent of 0.001.


Transmitting information of an object behind the obstacle to infinity.

Xu BB, Jiang WX, Meng LL, Cui TJ - Sci Rep (2015)

The test platform and fabricated sample.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4536636&req=5

f5: The test platform and fabricated sample.
Mentions: As pointed out in above, the thickness of each layer is 3 mm. In real fabrication, it is very difficult to etch the metallic structures on the curving dielectric substrates. Hence, we employ 12 sub-layers to compose each layer. The thickness of each sub-layer is 0.25 mm. The metallic SRR structures are etched on the sixth sub-layer, which is in the center of each layer. The thickness of the metallic structures, 0.035 mm, is negligible, compared to the thickness of the dielectric layers. The fabricated lens is shown in Fig. 5(b). A copper cylinder is put in the center of the transformed lens serving as an obstacle thus the incident waves cannot penetrate into it. Here we use F4B as dielectric substrates with the relative permittivity of 2.65 and a loss tangent of 0.001.

Bottom Line: We propose an illusion device that transforms a metallic cylinder into a Luneburg lens by using transformation optics.In order to realize the required-anisotropic parameters with high permittivity and low permeability, we design embedded split-ring resonators (SRRs) to increase the permittivity of the traditional SRR structures.In experiments, we fabricate and measure the transformed lens, and the tested results agree well with the numerical simulations and theoretical predictions.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.

ABSTRACT
We propose an illusion device that transforms a metallic cylinder into a Luneburg lens by using transformation optics. Such a transformed focusing lens guides electromagnetic waves to propagate around the central metallic cylinder smoothly and be focused on one spot, and thus the information of an object behind the obstacle can be transmitted to infinity. In order to realize the required-anisotropic parameters with high permittivity and low permeability, we design embedded split-ring resonators (SRRs) to increase the permittivity of the traditional SRR structures. In experiments, we fabricate and measure the transformed lens, and the tested results agree well with the numerical simulations and theoretical predictions. The proposed transformation lens can mimic some properties of Einstein gravitational lens because their wave propagation behaviors are very similar.

No MeSH data available.


Related in: MedlinePlus