Plasmons in the metallic nanoparticle -: Film system as a tunable impurity problem
Plasmons in the metallic nanoparticle -: Film system as a tunable impurity problem
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DOI：
10.1021/nl0515100
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发表时间：
2005-10-01
期刊：
影响因子：
10.8
通讯作者：
Nordlander, P
中科院分区：
文献类型：
--
作者：
Le, F;Lwin, NZ;Nordlander, P
我们证明了金属纳米粒子与金属薄膜表面等离子体相互作用的等离子体共振是无自旋安德森-法诺模型的电磁模拟。这是用来描述局域电子态与连续电子态带相互作用的相同模型。该模型的三个特征机制在此得以实现，其中纳米粒子等离子体共振的能量位于表面等离子体态的能带之上、内部或之下。这三种相互作用是由薄膜厚度控制的。后一种状态是通过实验观察和确定的。
We show that the plasmon resonances of a metallic nanoparticle interacting with the surface plasmons of a metallic film is an electromagnetic analogue of the spinless Anderson-Fano model. This is the same model used to describe the interaction of a localized electronic state with a continuous band of electronic states. The three characteristic regimes of this model are realized here, where the energy of the nanoparticle plasmon resonance lies above, within, or below the energy band of surface plasmon states. These three interaction regimes are controlled by film thickness. The latter regime is experimentally observed and identified.