Artificial magnetism of cross shaped metamaterial in green light frequencies

Artificial magnetism of cross shaped metamaterial in green light frequencies
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绿光频率下十字形超材料的人工磁性

DOI:
10.1016/j.optmat.2015.10.009
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发表时间:
2015-12
期刊:
影响因子:
3.9
通讯作者:
Ren Naifei
Ren Naifei
中科院分区:
材料科学3区
文献类型:
--
作者:
Cong Jiawei;Zhou Zhiqiang;Yun Binfeng;Yao Hongbing;Ren Naifei

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我们从理论上研究了十字形超材料在绿色光频率下的磁响应。这样的结构支持强磁共振,这导致大的负磁导率,并因此导致超过50 THz的负折射率带。该结构是低损耗的,并且在570 THz下表现出3.75的高FOM。通过调整几何尺寸可以有效地调整磁共振的工作频率和共振强度,这是很好地描述了由等效电路模型。该结构为实现可见光磁性器件提供了一种有效的手段。
We theoretically investigate the magnetic response of a cross-shaped metamaterial at green light frequencies. Such a structure supports a strong magnetic resonance, which results in a large negative permeability and hence a band of negative refractive index over 50 THz. The structure is low loss and exhibits a high FOM of 3.75 at 570 THz. The magnetic resonance can be effectively tailored both in operation frequency and resonance strength by means of adjusting the geometric dimensions, which is well described by the equivalent circuit model. The proposed structure may offer an effective means to realize the magnetic devices at visible frequencies.
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