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首页> 外文会议>Progress In Electromagnetic Research Symposium >Coupling effects in plasmonic nanoparticle arrays: The weak and the strong coupling regime and the effects of spin-orbit coupling
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Coupling effects in plasmonic nanoparticle arrays: The weak and the strong coupling regime and the effects of spin-orbit coupling

机译：等离子体纳米粒子阵列中的耦合效应：弱耦合状态和旋转轨道耦合的效应

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Summary form only given. We study the spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with fluorescent organic molecule film [1]. The evolution of spatial coherence of the structure is investigated both in weak and strong coupling regimes by systematically varying the coupling strength between the localized molecular excitons and the collective, delocalized modes of the nanoparticle array known as surface lattice resonances (SLRs). In stark contrast to pure localized excitons, the high degree of spatial coherence is maintained in the strong coupling regime, even when the mode is very exciton-like (80%). The results of our recent luminescence experiments will be presented. The effects of spin-orbit coupling are studied in periodic rectangular arrays of magnetic Ni nanoparticles [2]. We observe SLR modes in which the two directions of the lattice are coupled by the magnetic-field-controllable spin-orbit coupling in the nanoparticles. When breaking the symmetry of the lattice, we find that the optical response shows Fano-type surface lattice resonances whose frequency is determined by the periodicity orthogonal to the polarization of the incident field. In striking contrast, the magneto-optical Kerr response is controlled by the period in the parallel direction. The spectral separation of the response for longitudinal and orthogonal excitations provides versatile tuning of narrow and intense magneto-optical resonances.
机译：摘要表格仅给出。我们研究由荧光有机分子膜覆盖的周期性银纳米粒子阵列组成的系统的空间相干性能[1]。通过系统地改变局部分子激子和集体，被称为表面晶格阵列（SLRS）的纳米粒子阵列的集体阵列的偶联强度，在弱和强耦合方案中研究了该结构的空间相干性的演变。在与纯局部激发子的鲜明对比中，即使模式非常激动（80％），即使模式非常激动（80％），也保持高度的空间相干性。我们最近的发光实验的结果将被提出。在磁性Ni纳米颗粒的周期性矩形阵列中研究了旋转轨道耦合的影响[2]。我们观察到SLR模式，其中晶格的两个方向通过纳米颗粒中的磁场可控旋转轨道耦合耦合。当打破晶格的对称时，发现光学响应显示扇形型表面晶格共振，其频率由与事件场的极性正交的周期性确定。在引人注目的对比中，磁光kerr响应由平行方向上的时段控制。纵向和正交激发响应的光谱分离提供窄且强磁光共振的多功能调谐。

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