The Coupling Effects of Surface Plasmon Polaritons and Magnetic Dipole Resonances in Metamaterials.
The Coupling Effects of Surface Plasmon Polaritons and Magnetic Dipole Resonances in Metamaterials.
复制标题
超材料中表面等离子体激元与磁偶极子共振的耦合效应
DOI:
10.1186/s11671-017-2350-z
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发表时间:
2017-11-09
影响因子:
--
通讯作者:
Tang H
中科院分区:
文献类型:
--
作者:
Liu B;Tang C;Chen J;Yan Z;Zhu M;Sui Y;Tang H
We numerically investigate the coupling effects of surface plasmon polaritons (SPPs) and magnetic dipole (MD) resonances in metamaterials, which are composed of an Ag nanodisk array and a SiO2 spacer on an Ag substrate. The periodicity of the Ag nanodisk array leads to the excitation of SPPs at the surface of the Ag substrate. The near-field plasmon interactions between individual Ag nanodisks and the Ag substrate form MD resonances. When the excitation wavelengths of SPPs are tuned to approach the position of MD resonances by changing the array period of Ag nanodisks, SPPs and MD resonances are coupled together into two hybridized modes, whose positions can be well predicted by a coupling model of two oscillators. In the strong coupling regime of SPPs and MD resonances, the hybridized modes exhibit an obvious anti-crossing, resulting into an interesting phenomenon of Rabi splitting. Moreover, the magnetic fields under the Ag nanodisks are greatly enhanced, which may find some potential applications, such as magnetic nonlinearity.
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影响因子:
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作者:
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通讯作者:
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