Bellessa J, Bonnand C, Plenet J C, Mugnier J
Laboratoire de Physique de la Matière condensée et Nanostructures, CNRS UMR 5586, Univ. Lyon-1, Villeurbanne 69622, France.
Phys Rev Lett. 2004 Jul 16;93(3):036404. doi: 10.1103/PhysRevLett.93.036404. Epub 2004 Jul 15.
We report on the observation of a strong coupling between a surface plasmon and an exciton. Reflectometry experiments are performed on an organic semiconductor, namely, cyanide dye J aggregates, deposited on a silver film. The dispersion lines present an anticrossing that is the signature of a strong plasmon-exciton coupling. Mixed states are formed in a similar way as microcavities polaritons. The Rabi splitting characteristic of this coupling reaches 180 meV at room temperature. The emission of the low energy plasmon-exciton mixed state has been observed and is largely shifted from the uncoupled emission.
我们报道了表面等离子体激元和激子之间强耦合的观测结果。反射测量实验是在沉积于银膜上的一种有机半导体，即氰化物染料J聚集体上进行的。色散线呈现出反交叉，这是强等离子体激元 - 激子耦合的特征。混合态的形成方式与微腔极化激元类似。这种耦合的拉比分裂在室温下达到180毫电子伏特。已经观测到低能等离子体激元 - 激子混合态的发射，并且其发射与未耦合发射相比有很大的位移。
