Ultrafast manipulation of strong coupling in metal-molecular aggregate hybrid nanostructures.
Ultrafast manipulation of strong coupling in metal-molecular aggregate hybrid nanostructures.
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DOI：
10.1021/nn101973p
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发表时间：
2010-11
期刊：
影响因子：
17.1
通讯作者：
P. Vasa;R. Pomraenke;G. Cirmi;E. D. Re;Wei Wang;S. Schwieger;D. Leipold;E. Runge;G. Cerullo;C. Lienau
中科院分区：
文献类型：
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作者：
P. Vasa;R. Pomraenke;G. Cirmi;E. D. Re;Wei Wang;S. Schwieger;D. Leipold;E. Runge;G. Cerullo;C. Lienau
我们展示了一种在金属-分子聚集体混合纳米结构中对拉比分裂能Ω(R)的超快操纵。飞秒激发极大地改变了通过在金纳米灯阵列上涂覆一层薄的J聚集染料层而形成的模型系统的光学性质。通过映射耦合激发的非平衡色散关系，直接证明了在亚pS时间尺度上从强(Ω(R)≃55 meV)耦合到弱(Ω(R)≈0)耦合的可控和可逆的瞬时转换。激子和表面等离子体激子的这种外部可控的强耦合对于纳米等离子体电路中的超快全光开关应用具有重要的意义。
We demonstrate an ultrafast manipulation of the Rabi splitting energy Ω(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 (Ω(R) ≃ 55 meV) to weak (Ω(R) ≈ 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.