Tailoring Magnetic Dipole Emission with Plasmonic Split-Ring Resonators
Tailoring Magnetic Dipole Emission with Plasmonic Split-Ring Resonators
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DOI：
10.1103/physrevlett.111.026803
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发表时间：
2013-07-10
影响因子：
8.6
通讯作者：
Giessen, Harald
中科院分区：
文献类型：
--
作者：
Hein, Sven M.;Giessen, Harald
我们数值研究了位于共振等离子体分裂环谐振器（SRR）旁边的磁偶极子发射器的发射行为，SRR以其在近红外基本共振处的大磁矩而闻名。我们的结果相比，电偶极子发射器的情况下，SRR可以单独描述其电偶极矩。我们表明，磁偶极子发射器的情况下，类似的方法是不够的，因为对称性破缺由于差距必须考虑在内。我们演示了如何延迟之间的发射器和SRR可以被用来作为一个额外的自由度来操纵发射光谱。我们的概念将为磁偶极子发射器的高效等离子体天线铺平道路。
We numerically explore the emission behavior of magnetic dipole emitters located next to resonant plasmonic split-ring resonators (SRRs), which are well known for their large magnetic moment at their fundamental resonance in the near infrared. Our results are compared to the situation for electric dipole emitters, where the SRR can be described by solely its electric dipole moment. We show that a similar approach in the case of magnetic dipole emitters is not sufficient, as the symmetry breaking due to the gap has to be taken into account. We demonstrate how retardation between the emitter and the SRR can be used as an additional degree of freedom to manipulate the emission spectrum. Our concept will pave the road towards efficient plasmonic antennas for magnetic dipole emitters.