Simulations of ferrite-dielectric-wire composite negative index materials
Simulations of ferrite-dielectric-wire composite negative index materials
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DOI：
10.1103/physrevlett.99.057202
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发表时间：
2007-08-03
影响因子：
8.6
通讯作者：
Vittoria, Carmine
中科院分区：
文献类型：
--
作者：
Rachford, Frederic J.;Armstead, Douglas N.;Vittoria, Carmine
我们进行了广泛的有限差分时域模拟铁氧体基负折射率复合材料。采用线栅来提供负介电常数。铁氧体和线栅相互作用以在铁氧体谐振附近提供负折射率和正折射率透射峰。尽管复合材料的折射率具有极端的各向异性，但在复合材料空气界面处观察到负折射，从而允许构造具有磁性可调焦距的聚焦凹透镜。
We perform extensive finite difference time domain simulations of ferrite based negative index of refraction composites. A wire grid is employed to provide negative permittivity. The ferrite and wire grid interact to provide both negative and positive index of refraction transmission peaks in the vicinity of the ferrite resonance. Notwithstanding the extreme anisotropy in the index of refraction of the composite, negative refraction is seen at the composite air interface allowing the construction of a focusing concave lens with a magnetically tunable focal length.