共 28 条
Extremely Thin Dielectric Metasurface for Carpet Cloaking
被引:65
作者:

Hsu, Li Yi
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA

Lepetit, Thomas
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h-index: 0
机构:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA

Kante, Boubacar
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h-index: 0
机构:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
机构:
[1] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
关键词:
METAMATERIALS;
FREQUENCIES;
D O I:
10.2528/PIER15032005
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
We demonstrate a novel and simple geometrical approach to cloaking a scatterer on a ground plane. We use an extremely thin dielectric metasurface to reshape the wavefronts distorted by a scatterer in order to mimic the reflection pattern of a flat ground plane. To achieve such carpet cloaking, the reflection angle has to be equal to the incident angle everywhere on the scatterer. We use a graded metasurface and calculate the required phase gradient to achieve cloaking. Our metasurface locally provides additional phase to the wavefronts to compensate for the phase difference amongst light paths induced by the geometrical distortion. We design our metasurface in the microwave range using highly sub-wavelength dielectric resonators. We verify our design by full-wave time-domain simulations using micro-structured resonators and show that results match theory very well. This approach can be applied to hide any scatterer under a metasurface of class C-1 (first derivative continuous) on a ground plane not only in the microwave regime, but also at higher frequencies up to the visible.
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页码:33 / 40
页数:8
相关论文
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