Ultrafast manipulation of the Rabi splitting in metal-molecular aggregate hybrid nanostructures
Ultrafast manipulation of the Rabi splitting in metal-molecular aggregate hybrid nanostructures
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超快操纵拉比分裂成金属分子聚集体混合纳米结构
DOI：
10.1002/pssc.201000858
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
C. Lienau
中科院分区：
文献类型：
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作者：
P. Vasa;R. Pomraenke;G. Cirmi;E. De Re;W. Wang;S. Schwieger;D. Leipold;E. Runge;G. Cerullo;C. Lienau
我们报告了金属分子聚集体混合纳米结构的光学性质的实验研究，该混合纳米结构由涂覆有薄J聚集染料层的金纳米狭缝阵列组成。我们的实验揭示了在纳米缝阵列上激发的表面等离子激元（SPPs）与具有大拉比分裂能（ΩR）的聚集激子之间的强耦合。超快激发极大地改变了混合纳米结构的光学响应，诱导从强到弱的耦合制度，由于激子共振漂白的瞬态切换。外部控制的切换是完全可逆的，并且发生在亚ps时间尺度上。结果在一个唯象的两个耦合振子模型解释。这种强相互作用可以例如，可用于制造超快全光等离子体开关或可调镜。（© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
We report on an experimental study of the optical properties of a metal‐molecular aggregate hybrid nanostructure consisting of a gold nanoslit array coated with a thin J‐aggregated dye layer. Our experiments reveal a strong coupling between the surface plasmon polaritons (SPPs) excited on a nanoslit array and the aggregate excitons with a large Rabi splitting energy (ΩR). Ultrafast excitation drastically alters the optical response of the hybrid nanostructure inducing transient switching from the strong to weak the coupling regime due to the bleaching of the exciton resonance. The externally controlled switching is fully reversible and occurs on sub‐ps timescale. The results are explained within a phenomenological two coupled oscillator model. Such a strong interaction can, e.g., be used to fabricate ultrafast all‐optical plasmonic switches or tunable mirrors. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)