期刊
ACS NANO
卷 4, 期 12, 页码 7559-7565出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn101973p
关键词
surface plasmon polaritons; metal nanostructures; molecular aggregates; organic semiconductors; time-resolved spectroscopy
类别
资金
- Deutsche Forschungsgemeinschaft [SPP 1391]
- European Community [FP-7-INFRASTRUCTURES-2008-1, 228334]
- Korea Foundation for International Cooperation of Science and Technology (Global Research Laboratory) [K20815000003]
We demonstrate an ultrafast manipulation of the Rabi splitting energy Omega(R) in a metal molecular aggregate hybrid nanostructure. Femtosecond excitation drastically alters the optical properties of a model system formed by coating a gold nanoslit array with a thin J-aggregated dye layer. Controlled and reversible transient switching from strong ( Omega(R) similar or equal to 55 meV) to weak ( Omega(R) approximate to 0) coupling on a sub-ps time scale is directly evidenced by mapping the nonequilibrium dispersion relations of the coupled excitations. Such a strong, externally controllable coupling of excitons and surface plasmon polaritons is of considerable interest for ultrafast all-optical switching applications in nanoscale plasmonic circuits.
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