Harvesting excitons through plasmonic strong coupling
Harvesting excitons through plasmonic strong coupling
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DOI：
10.1103/physrevb.92.121402
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发表时间：
2015-09-08
影响因子：
3.7
通讯作者：
Garcia-Vidal, Francisco J.
中科院分区：
文献类型：
--
作者：
Gonzalez-Ballestero, Carlos;Feist, Johannes;Garcia-Vidal, Francisco J.
激子收获被证明在一个合奏的量子发射耦合到本地化的表面等离子体。当发射极与金属纳米球的偶极模之间的相互作用达到强耦合状态时，激子电导大大增加。的空间地图的电导匹配的等离子体激元场强度分布，这表明，传输特性可以通过适当地调整等离子体激元共振的字段。在强耦合下，我们发现，纯退相可以有不利或有益的影响的电导，这取决于参与发射器的有效数量。最后，我们表明，在强耦合制度的激子输运发生在超快的时间尺度上给出的反拉比分裂（类似于10 fs），这是数量级快于运输通过直接跳跃之间的发射器。
Exciton harvesting is demonstrated in an ensemble of quantum emitters coupled to localized surface plasmons. When the interaction between emitters and the dipole mode of a metallic nanosphere reaches the strong-coupling regime, the exciton conductance is greatly increased. The spatial map of the conductance matches the plasmon field intensity profile, which indicates that transport properties can be tuned by adequately tailoring the field of the plasmonic resonance. Under strong coupling, we find that pure dephasing can have detrimental or beneficial effects on the conductance, depending on the effective number of participating emitters. Finally, we show that the exciton transport in the strong-coupling regime occurs on an ultrafast time scale given by the inverse Rabi splitting (similar to 10 fs), which is orders of magnitude faster than transport through direct hopping between the emitters.