论文标题

等离子体共振群库仑衰减

Plasmonic Resonant Intercluster Coulombic Decay

论文作者

Shaik, Rasheed, Varma, Hari R., Madjet, Mohamed El-Amine, Zheng, Fulu, Frauenheim, Thomas, Chakraborty, Himadri S.

论文摘要

通过等离子体激发在纳米簇中的光诱导的能量限制会影响纳米光子学,光催化和受控慢电子源的设计中的应用。这些激发通过集群的电离连续体的共振衰减提供了集体电子行为的独特探针。但是,将该衰减幅度的一部分转移到第二个共轭群集的连续体中可能会提供控制和功效,以非局部共享能量以激发远程集体事件。以两个等离子系统的球形嵌套二聚体Na20@C240的示例,我们发现可以通过共振的群间库仑衰变(RICD)作为基本过程进行转移。可以通过光电速度图成像技术来实验检测到该等离子RICD信号。

Light-induced energy confinement in nanoclusters via plasmon excitations influences applications in nanophotonics, photocatalysis, and the design of controlled slow electron sources. The resonant decay of these excitations through the cluster's ionization continuum provides a unique probe of the collective electronic behavior. However, the transfer of a part of this decay amplitude to the continuum of a second conjugated cluster may offer control and efficacy in sharing the energy nonlocally to instigate remote collective events. With the example of a spherically nested dimer Na20@C240 of two plasmonic systems we find that such a transfer is possible through the resonant intercluster Coulomb decay (RICD) as a fundamental process. This plasmonic RICD signal can be experimentally detected by the photoelectron velocity map imaging technique.

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