Abstract The Fano and Rabi models represent remarkably common effects in optics. Here we study the coherent time dynamics of plasmonic systems exhibiting Fano and Rabi spectral responses. We demonstrate that these systems show fundamentally different dynamics. A plasmonic system with a Fano resonance displays at most one temporal beat under pulsed excitation, whereas a plasmonic system in the Rabi-like regime may have any number of beats. Remarkably, the Fano-like systems show time dynamics with very characteristic coherent tails despite the strong decoherence that is intrinsic for such systems. The coherent Fano and Rabi dynamics that we predicted can be observed in plasmonic nanocrystal dimers in time-resolved experiments. Our study demonstrates that such coherent temporal plasmonics includes non-trivial and characteristic relaxation behaviors and presents an interesting direction to develop with further research.

中文翻译：

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时间等离子体：金属纳米结构时域中的 Fano 和 Rabi 机制

摘要 Fano 和 Rabi 模型代表了光学中非常常见的效应。在这里，我们研究了表现出 Fano 和 Rabi 光谱响应的等离子体系统的相干时间动力学。我们证明这些系统显示出根本不同的动态。具有 Fano 共振的等离子体系统在脉冲激发下最多显示一个时间节拍，而类似 Rabi 的等离子体系统可能有任意数量的节拍。值得注意的是，尽管此类系统具有很强的退相干性，但类 Fano 系统显示出具有非常典型的相干尾部的时间动态。我们预测的相干 Fano 和 Rabi 动力学可以在时间分辨实验中在等离子体纳米晶体二聚体中观察到。