Plasmon coupling between the dipolar localized surface plasmons of a nanoegg and the longitudinal dipolar localized surface plasmons of a nearby gold nanorod is investigated within a dipolar-quasistatic limit. This was achieved by varying the core-offset of the nanoegg for different nanorod sizes at a fixed coupling distance. With respect to the plasmon peaks of the isolated nanoegg, we studied blue shifted, resonant, and red shifted nanorods. We show that besides plasmon-induced resonance shifts, which occurred in all three cases studied, transparency dips are induced in both the absorption and scattering spectra of the nanoegg–nanorod dimer. The latter effect depends on the plasmon detuning frequency and the nanorod absorption cross section. In comparison to a nanoegg–nanosphere dimer, the optical properties of the nanoegg–nanorod dimer are more enhanced.

中文翻译：

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纳米卵-纳米节异二聚体的光学性质：准静态分析

在偶极准静态极限内研究了纳米蛋的偶极局部表面等离子体激元与附近金纳米棒的纵向偶极局部表面等离子体激元之间的等离子体耦合。这是通过以固定的耦合距离改变不同纳米棒尺寸的纳米蛋的芯偏移来实现的。关于孤立的纳米蛋的等离激元峰，我们研究了蓝移，共振和红移纳米棒。我们表明，除了在所有三种研究中均发生的由等离振子引起的共振移动之外，在纳米蛋-纳诺德二聚体的吸收光谱和散射光谱中均诱发了透明度下降。后一种效应取决于等离激元失谐频率和纳米棒吸收截面。与纳蛋-纳米球二聚体相比，