Tunable electric and magnetic resonances in multilayered metal/dielectric nanoplates at optical frequencies

Tunable electric and magnetic resonances in multilayered metal/dielectric nanoplates at optical frequencies
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多层金属/电介质纳米板在光频率下的可调谐电和磁共振

DOI:
10.1088/0022-3727/43/34/345102
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发表时间:
2010-09
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
M Wang
M Wang
中科院分区:
其他
文献类型:
--
作者:
D Li;L Qin;D X Qi;F Gao;R W Peng;J Zou;Q J Wang;M Wang

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在这项工作中,我们研究了多层Ag/SiO2纳米板在光学频率下的电磁响应。通过有效磁导率和介电常数、电场和磁场分布以及斜入射下测量的透射率,证明了源自局部表面等离子体的电和磁共振。此外,电共振和磁共振可以根据纳米板的几何参数来定制。在矩形纳米片中,磁共振仅随入射偏振方向的宽度变化而变化,而电共振随纳米片长宽比的变化而明显变化。这项研究可能为光学超材料提供一个可调的基石。
In this work, we investigate electromagnetic responses in multilayered Ag/SiO2 nanoplates at optical frequencies. Electric and magnetic resonances, which originate from localized surface plasmons, are demonstrated by the effective permeability and permittivity, electric and magnetic field distributions, and measured transmission at oblique incidence. Furthermore, electric and magnetic resonances can be tailored by the geometrical parameters of the nanoplates. In a rectangular nanoplate, magnetic resonance only shifts with the width along the incident polarization, and electric resonance shifts obviously as the aspect ratio of the nanoplate changes. The investigation may provide a tunable building block for optical metamaterials.
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