Magnetic response of metamaterials at 100 terahertz
Magnetic response of metamaterials at 100 terahertz
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DOI：
10.1126/science.1105371
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发表时间：
2004-11-19
期刊：
影响因子：
56.9
通讯作者：
Soukoulis, CM
中科院分区：
文献类型：
--
作者：
Linden, S;Enkrich, C;Soukoulis, CM
单个金属开口环的阵列可用于实现100太赫兹频率下的磁共振，该磁共振由电感器-电容器电路（LC）共振引起。在我们的实验中使用的垂直入射的几何形状的LC共振的激发发生通过入射光的电场的电容的耦合。纳米金结构的测量光谱非常接近理论预期。额外的数值模拟表明，我们的结构表现出负磁导率的梁配置，其中磁场耦合到LC谐振的频率范围。与具有负介电常数的电响应一起，这可以导致具有负折射率的材料。
An array of single nonmagnetic metallic split rings can be used to implement a magnetic resonance, which arises from an inductor-capacitor circuit (LC) resonance, at 100-terahertz frequency. The excitation of the LC resonance in the normal-incidence geometry used in our experiments occurs through the coupling of the electric field of the incident light to the capacitance. The measured optical spectra of, the nanofabricated gold structures come very close to the theoretical expectations. Additional numerical simulations show that our structures exhibit a frequency range with negative permeability for a beam configuration in which the magnetic field couples to the LC resonance. Together with an electric response that has negative permittivity, this can lead to materials with a negative index of refraction.