Optical Stark Effects in J-Aggregate-Metal Hybrid Nanostructures Exhibiting a Strong Exciton-Surface-Plasmon-Polariton Interaction
Optical Stark Effects in J-Aggregate-Metal Hybrid Nanostructures Exhibiting a Strong Exciton-Surface-Plasmon-Polariton Interaction
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DOI：
10.1103/physrevlett.114.036802
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发表时间：
2015-01-21
影响因子：
8.6
通讯作者：
Lienau, C.
中科院分区：
文献类型：
--
作者：
Vasa, P.;Wang, W.;Lienau, C.
我们报告了在 J-聚集体-金属杂化纳米结构中观察到的光学斯塔克效应，表现出强激子-表面-等离子体-极化子耦合。对于红移非共振激发，泵浦-探针光谱显示由泵浦引起的极化子共振斯塔克位移引起的激子-表面-等离激元-极化子耦合模式的短寿命色散线形状。对于较大的耦合强度，斯塔克位移的符号通过简正模分裂的瞬态减少而反转。我们的研究展示了一种在强耦合混合系统中相干控制和很大程度上增强光学斯塔克效应的方法。这对于超快全光交换应用可能很有用。
We report on the observation of optical Stark effects in J-aggregate-metal hybrid nanostructures exhibiting strong exciton-surface-plasmon-polariton coupling. For redshifted nonresonant excitation, pump-probe spectra show short-lived dispersive line shapes of the exciton-surface-plasmon-polariton coupled modes caused by a pump-induced Stark shift of the polariton resonances. For larger coupling strengths, the sign of the Stark shift is reversed by a transient reduction in normal mode splitting. Our studies demonstrate an approach to coherently control and largely enhance optical Stark effects in strongly coupled hybrid systems. This may be useful for applications in ultrafast all-optical switching.