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arXiv physics/0610269physics.opticscond-mat.mes-hall
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周期性金属纳米颗粒链中的等离子体激元模:直接动力学本征模分析

Plasmonic modes in periodic metal nanoparticle chains: A direct dynamic eigenmode analysis

Kin Hung Fung, C. T. Chan

摘要:

我们展示了一个有效的本征分解方法分析金属纳米颗粒链中的导模。该方法的优点是可以同时显示色散关系和模式质量。它还可以分离材料和几何性质,因此其效率不依赖于材料极化率的复杂性。应用该方法分析了单金属链和双金属链的导模。更准确的动态偶极极化率通常给出一个红移与广泛使用的准静态偶极极化率与辐射校正的结果相比。

英文摘要:

We demonstrate an efficient eigen-decomposition method for analyzing the guided modes in metal nanoparticle chains. The proposed method has the advantage of showing the dispersion relation and mode quality simultaneously. It can also separate the material and geometrical properties, so its efficiency does not depend on the complexity of the material polarizability. The method is applied to analyze the guided modes of a single and a pair of metal chains. The more accurate dynamic dipole polarizability typically gives a red-shift compared with the results obtained with the broadly used quasistatic dipole polarizability with radiation correction.

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