期刊
PHYSICAL REVIEW B
卷 93, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.155156
关键词
-
资金
- project Passive and Active Metamaterial Structures for Guiding, Scattering and Radiation of Electromagnetic Energy, Unity Through Knowledge Fund (UKF) [09/13]
- project Arbitrary Control of Guided and Radiated Electromagnetic Waves Using Metasurfaces, Air Force Office of Scientific Research (AFOSR) [FA9550-15-1-0101]
To date, research on metasurfaces has predominantly focused on those with polarizabilities that are tangent to the metasurface. Only a few theoretical works have characterized metasurfaces with normal polarizabilities. Here, we provide full analytical, numerical, and experimental characterizations of a metasurface that can be described with polarizabilities in all three spatial directions. First, a set of equations is derived that allows a surface distribution of scatterers to be replaced by a sheet boundary condition. It is shown that the extraction of unknown polarizabilities in the normal direction necessarily requires scattering parameters obtained from oblique incidence. Closed-form expressions that relate scattering parameters to surface susceptibilities in all three spatial directions are given. It is shown that the reflection and transmission properties of the metasurface can be predicted, for an arbitrary angle of incidence, from the sheet parameters. In addition, we report the experimental characterization of a metasurface with polarizabilities in the normal direction. The free-space measurements were performed on a recently proposed DB metasurface at 10 GHz. Experiments confirmed that the sheet parameters do not change with angle of incidence. Consequently, it was possible to extract surface susceptibilities in the normal direction from measured transmission parameters alone.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据